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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Value of the negative of the heat of combustion when the product water is a liquid, is(a) Higher Heating value(b) Lower Heating value(c) Neither Higher nor Lower Heating value(d) None of the mentionedThis question was addressed to me during an interview.My enquiry is from Energy Balances for a Chemical Reaction in section Energy Balances of Chemical Process Calculation |
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Answer» Correct answer is (a) HIGHER Heating value |
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| 52. |
_________________ is the enthalpy change that is associated with a reaction.(a) Standard Heat of Formation(b) Heat of Reaction(c) Heat of Combustion(d) None of the mentionedI had been asked this question by my school teacher while I was bunking the class.My doubt is from Energy Balances for a Chemical Reaction topic in section Energy Balances of Chemical Process Calculation |
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Answer» CORRECT ANSWER is (b) Heat of Reaction Explanation: Heat of Reaction is the enthalpy change that is ASSOCIATED with a reaction. |
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| 53. |
The negative of heat of vaporization is(a) Heat of Condensation(b) Heat of fusion(c) Heat of solidification(d) Heat of sublimationThe question was posed to me in class test.The doubt is from Enthalpy in chapter Energy Balances of Chemical Process Calculation |
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Answer» Correct choice is (a) HEAT of Condensation |
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| 54. |
What is H1?(a) Heat of fusion(b) Heat of vaporization(c) Heat of sublimation(d) None of the mentionedI have been asked this question by my school teacher while I was bunking the class.My enquiry is from Enthalpy in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct ANSWER is (a) Heat of FUSION |
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| 55. |
For any irreversible process, the net entropy change is(a) Positive(b) zero(c) negative(d) infiniteI had been asked this question during a job interview.My question comes from Energy Balances in chapter Energy Balances of Chemical Process Calculation |
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Answer» Right choice is (a) Positive |
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| 56. |
When a shaft in the system turns a pump to pump water out of the system, the shaft work is(a) Positive(b) Negative(c) Zero(d) None of the mentionedThe question was asked during a job interview.This key question is from Energy Balances in portion Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT choice is (B) Negative |
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| 57. |
If Q = 45 W and The values of U and A are 10 and 2.5 with their respective SI units. What is the temperature difference between system and surrounding?(a) 1.8 Degree Celsius(b) 1.8 Degree Fahrenheit(c) 1.8 Degree Rankine(d) None of the mentionedThis question was addressed to me by my school teacher while I was bunking the class.The origin of the question is Energy Balances in section Energy Balances of Chemical Process Calculation |
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Answer» RIGHT answer is (a) 1.8 DEGREE CELSIUS The explanation: T2-T1 = 1.8 Degree Celsius, Q = UA(T2-T1). |
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| 58. |
Heat transfer is caused by(a) Pressure difference(b) Temperature difference(c) Volume difference(d) None of the mentionedThe question was asked by my college professor while I was bunking the class.My question is from Energy Balances in division Energy Balances of Chemical Process Calculation |
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Answer» Right option is (b) Temperature DIFFERENCE |
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| 59. |
A general energy balance(a) U+25B3E = W + Q(b) U+25B3E = W – Q(c) U+25B3E = -W + Q(d) None of the mentionedI got this question during an online exam.This question is from Energy Balances without Reaction in section Energy Balances of Chemical Process Calculation |
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Answer» CORRECT ANSWER is (a) U+25B3E = W + Q Best EXPLANATION: U+25B3E = W + Q. |
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| 60. |
For an unsteady state closed system , energy balance is(a) U+25B3E = U+25B3(U + PE + KE)(b) U+25B3E = U+25B3(U + PE – KE)(c) U+25B3E = U+25B3(U – PE -KE)(d) None of the mentionedThe question was posed to me in exam.The above asked question is from Energy Balances without Reaction in section Energy Balances of Chemical Process Calculation |
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Answer» Correct ANSWER is (a) U+25B3E = U+25B3(U + PE + KE) |
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| 61. |
What is the work done for isobaric process (100 KPa)?(a) 10 KJ(b) 20 KJ(c) 30 KJ(d) 40 KJThe question was asked in homework.My question comes from Energy Balances in chapter Energy Balances of Chemical Process Calculation |
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| 62. |
When Q = 0, there is possibility that(a) Temperature of system and surrounding are same(b) System is an adiabatic system(c) Both a and b(d) Neither a nor bI got this question during a job interview.This question is from Energy Balances topic in division Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT OPTION is (C) Both a and b |
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| 63. |
Heating always results in an increase in temperature. The statement is(a) Correct(b) Incorrect(c) Always correct(d) None of the mentionedI got this question in a job interview.I would like to ask this question from Energy Balances in section Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT answer is (B) Incorrect |
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| 64. |
Heat transfer can occur by(a) Conduction(b) Convection(c) Radiation(d) All of the mentionedThis question was posed to me in class test.My doubt is from Energy Balances topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT OPTION is (d) All of the mentioned |
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| 65. |
Which one is not a path variable?(a) Work(b) Heat(c) Internal Energy(d) None of the mentionedI have been asked this question in an interview.I'm obligated to ask this question of Energy Balances in section Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT choice is (c) INTERNAL ENERGY |
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| 66. |
A system in which the pressure is constant during a process is(a) Adiabatic system(b) Isobaric system(c) Isochoric system(d) Isothermal systemI had been asked this question in an interview.This question is from Energy Balances in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct CHOICE is (B) Isobaric system |
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| 67. |
A property that does not dependent on amount of material present in the system is(a) Extensive property(b) Intensive property(c) Neither Intensive nor Extensive(d) None of the mentionedI have been asked this question by my college professor while I was bunking the class.My question is based upon Energy Balances topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct OPTION is (B) INTENSIVE property |
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| 68. |
Heating value is the negative of the ______________(a) Standard Heat of Formation(b) Standard Heat of Reaction(c) Standard Heat of Combustion(d) None of the mentionedThe question was posed to me in an international level competition.Origin of the question is Energy Balances for a Chemical Reaction in chapter Energy Balances of Chemical Process Calculation |
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Answer» CORRECT answer is (c) Standard HEAT of Combustion The best I can EXPLAIN: Heating VALUE is the negative of the Standard Heat of Combustion. |
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| 69. |
Turbine is an example of(a) Open, steady state process(b) Open, unsteady state process(c) Closed, steady state process(d) None of the mentionedI have been asked this question in class test.The question is from Energy Balances without Reaction in section Energy Balances of Chemical Process Calculation |
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Answer» Right choice is (a) Open, STEADY state PROCESS |
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| 70. |
For an open system, energy balance is(a) U+25B3E = Q + W – U+25B3(H + KE + PE)(b) U+25B3E = Q + W + U+25B3(H + KE + PE)(c) U+25B3E = Q + W – U+25B3(H – KE + PE)(d) None of the mentionedI got this question during an internship interview.The query is from Energy Balances without Reaction in portion Energy Balances of Chemical Process Calculation |
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Answer» The correct choice is (a) U+25B3E = Q + W – U+25B3(H + KE + PE) |
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| 71. |
_________ represents a microscopic account of all the molecular, atomic, and subatomic energies.(a) Potential energy(b) Kinetic energy(c) Internal energy(d) None of the mentionedI had been asked this question in an interview.I'm obligated to ask this question of Internal Energy in division Energy Balances of Chemical Process Calculation |
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Answer» Correct CHOICE is (c) INTERNAL ENERGY |
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| 72. |
Adiabatic system is a perfectly insulated system. The statement is(a) True(b) False(c) Applicable for some systems(d) None of the mentionedThe question was posed to me in a national level competition.My question is based upon Energy Balances topic in section Energy Balances of Chemical Process Calculation |
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Answer» CORRECT ANSWER is (a) True Best EXPLANATION: Adiabatic SYSTEM is a perfectly INSULATED system. |
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| 73. |
Standard heats of formation are _________ for exothermic reaction.(a) Negative(b) Positive(c) Zero(d) None of the mentionedI have been asked this question in an interview for internship.This interesting question is from Energy Balances for a Chemical Reaction topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» Right choice is (a) NEGATIVE |
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| 74. |
Which one of correct relation ?(a) Cp + Cv = 0(b) Cp = 1 + R/Cv(c) 1 = Cp/Cv(d) Cp = R + CvThis question was posed to me at a job interview.My question comes from Heat Capacity topic in portion Energy Balances of Chemical Process Calculation |
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Answer» RIGHT OPTION is (d) Cp = R + CV For EXPLANATION: Cp = R + Cv. |
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| 75. |
Internal energy is a(a) Path variable(b) State variable(c) Neither path nor a state variable(d) None of the mentionedThis question was addressed to me in an interview for job.This key question is from Internal Energy in division Energy Balances of Chemical Process Calculation |
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Answer» The correct OPTION is (B) State variable |
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| 76. |
_____________ is the form of energy that represents a transfer of energy between the system and surrounding.(a) Potential energy(b) Kinetic energy(c) Work(d) None of the mentionedI got this question at a job interview.The above asked question is from Energy Balances topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» RIGHT option is (C) Work Explanation: Work is the FORM of energy that represents a TRANSFER of energy between the and SURROUNDING. |
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| 77. |
For a steady state closed system(a) U+25B3U > 0(b) U+25B3U < 0(c) U+25B3U = 0(d) None of the mentionedThis question was addressed to me in my homework.This intriguing question originated from Energy Balances without Reaction topic in portion Energy Balances of Chemical Process Calculation |
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Answer» CORRECT choice is (C) U+25B3U = 0 Explanation: For a steady state CLOSED SYSTEM, U+25B3U = 0. |
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| 78. |
For an mono atomic ideal gas Cv is(a) 1.5 R(b) 2.5 R(c) 3.5 R(d) 4.5 RI got this question in an online quiz.I would like to ask this question from Heat Capacity in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct OPTION is (a) 1.5 R |
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| 79. |
Which one is true for internal energy?(a) It is sum of all forms of energies associated with molecules of a system(b) It is a state function of a system(c) It is proportional to transnational K.E of the molecules(d) All of the mentionedI have been asked this question during a job interview.Asked question is from Internal Energy topic in division Energy Balances of Chemical Process Calculation |
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| 80. |
Cv is the change in internal energy at constant _______________(a) Pressure(b) Temperature(c) Volume(d) None of the mentionedThe question was asked in an interview.This intriguing question comes from Internal Energy in division Energy Balances of Chemical Process Calculation |
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Answer» Right answer is (c) VOLUME |
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| 81. |
Specific internal energy is a path variable. The statement is(a) True(b) False(c) Always true(d) None of the mentionedI had been asked this question during an internship interview.The doubt is from Internal Energy in portion Energy Balances of Chemical Process Calculation |
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Answer» CORRECT answer is (b) False Best EXPLANATION: Specific internal ENERGY is a STATE variable. |
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| 82. |
Specific Potential energy is(a) mgh(b) gh(c) h(d) None of the mentionedThe question was asked in an interview for job.This question is from Kinetic and Potential Energy in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct OPTION is (b) GH |
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| 83. |
What is the unit of Specific kinetic energy?(a) J(b) J/kg(c) Pa(d) NThe question was asked in unit test.My question is from Kinetic and Potential Energy topic in division Energy Balances of Chemical Process Calculation |
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Answer» Correct ANSWER is (B) J/kg |
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| 84. |
Energy a system possesses because of its velocity relative to the surrounding is(a) Kinetic Energy(b) Potential Energy(c) Work(d) None of the mentionedI got this question in an internship interview.The query is from Kinetic and Potential Energy topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» The correct CHOICE is (a) KINETIC Energy |
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| 85. |
The intensive property of thermodynamics is(a) Density(b) Mass(c) Energy(d) VolumeI got this question in examination.The doubt is from Energy Balances topic in division Energy Balances of Chemical Process Calculation |
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Answer» RIGHT OPTION is (a) DENSITY Best EXPLANATION: Density does not depend on the amount of material present. |
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| 86. |
Any variable whose value depends only on the state of the system is called(a) Path variable(b) State variable(c) Neither Path nor State variable(d) None of the mentionedI got this question in an interview.My question is based upon Energy Balances topic in division Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT CHOICE is (b) STATE variable |
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| 87. |
For ideal gases, Enthalpy and Internal energy is only the function of __________(a) Pressure(b) Volume(c) Temperature(d) None of the mentionedThe question was posed to me in an internship interview.My doubt stems from Enthalpy in portion Energy Balances of Chemical Process Calculation |
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Answer» Correct option is (c) Temperature |
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| 88. |
When surrounding perform a work on the system, work is(a) Positive(b) Negative(c) Zero(d) None of the mentionedThe question was posed to me by my school teacher while I was bunking the class.This key question is from Energy Balances topic in section Energy Balances of Chemical Process Calculation |
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Answer» Correct ANSWER is (a) Positive |
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| 89. |
For enthalpy reference state is at which the enthalpy is(a) Zero(b) Positive(c) Negative(d) None of the mentionedThis question was addressed to me during an interview for a job.This interesting question is from Energy Balances for a Chemical Reaction topic in section Energy Balances of Chemical Process Calculation |
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Answer» Correct CHOICE is (a) ZERO |
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| 90. |
For enthalpy reference state is at which the enthalpy is(a) Zero(b) Positive(c) Negative(d) None of the mentionedThis question was addressed to me in an internship interview.The origin of the question is Energy Balances for a Chemical Reaction in section Energy Balances of Chemical Process Calculation |
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| 91. |
The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume is(a) Cv(b) Cp(c) Latent heat(d) none of the mentionedThis question was posed to me in an interview.I'm obligated to ask this question of Heat Capacity topic in division Energy Balances of Chemical Process Calculation |
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Answer» The correct choice is (a) Cv |
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| 92. |
What is the Enthalpy change for a 10 Kg mole Oxygen gas that is heated from 200 K to 400 K at constant pressure. (Cv = 40000 J/(Kg*mole)*(Degree Celsius))(a) 20*10^6(b) 40*10^6(c) 60*10^6(d) 80*10^6The question was asked in an interview for job.This intriguing question comes from Enthalpy topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» RIGHT option is (d) 80*10^6 Explanation: H2 – H1 = NCP(T2-T1). |
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| 93. |
A system that does not exchange heat with the surroundings during a process is(a) Adiabatic system(b) Isobaric system(c) Isochoric system(d) Isothermal systemI had been asked this question in a job interview.This key question is from Energy Balances topic in division Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT answer is (a) ADIABATIC system |
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| 94. |
An example of phase transition is(a) Liquid to gas phase(b) Gas to liquid phase(c) Solid to liquid phase(d) All of the mentionedI got this question in homework.The above asked question is from Enthalpy topic in portion Energy Balances of Chemical Process Calculation |
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Answer» CORRECT option is (d) All of the mentioned Easy EXPLANATION: Phase CHANGE is OCCURRING in each CASE. |
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| 95. |
Heat is ___________ when transferred to a system.(a) Positive(b) Negative(c) Zero(d) None of the mentionedThis question was addressed to me during a job interview.This intriguing question comes from Energy Balances in chapter Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT choice is (a) Positive |
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| 96. |
A system in which the volume is invariant during a process is(a) Adiabatic system(b) Isobaric system(c) Isochoric system(d) Isothermal systemThe question was posed to me during a job interview.Query is from Energy Balances topic in chapter Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT ANSWER is (C) Isochoric SYSTEM |
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| 97. |
System is enclosed by(a) Boundary(b) Surrounding(c) Layers(d) None of the mentionedI got this question by my school teacher while I was bunking the class.My question is based upon Energy Balances in portion Energy Balances of Chemical Process Calculation |
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Answer» The CORRECT choice is (a) BOUNDARY |
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| 98. |
For a steady state closed system(a) U+25B3E > 0(b) U+25B3E < 0(c) U+25B3E = 0(d) None of the mentionedI have been asked this question during an internship interview.My enquiry is from Energy Balances without Reaction topic in division Energy Balances of Chemical Process Calculation |
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Answer» Correct option is (c) U+25B3E = 0 |
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| 99. |
For a steady state closed system(a) Q + W > 0(b) Q + W < 0(c) Q + W = 0(d) None of the mentionedI had been asked this question in a national level competition.The question is from Energy Balances without Reaction in section Energy Balances of Chemical Process Calculation |
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Answer» CORRECT OPTION is (c) Q + W = 0 To EXPLAIN: For a steady state closed system, U+25B3E = 0. |
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| 100. |
In constant volume thermodynamic process work done is(a) Maximum(b) Minimum(c) Zero(d) None of the mentionedI got this question during an interview for a job.I want to ask this question from Energy Balances in portion Energy Balances of Chemical Process Calculation |
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Answer» RIGHT ANSWER is (c) Zero To explain: W = P(V2-V1). |
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