A solid body of constant heat capacity `1J//^@C` is being heated by keeping it contact with reservoirs in two ways: (i) Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies same amount of heat. (ii) Sequentially keeping in contact with 8 reservoir such that each reservoir supplies same amount of heat. In both the cases body is brought from initial temperature `100^C` to final temperature `200^@C`. Entropy change of the body in the tow cases respectively is :A. `ln 2, 4ln2`B. `ln2, ln 2`C. `ln2, 2ln, 2`D. `2ln 2n, 8ln2`

A solid body of constant heat capacity `1J//^@C` is being heated by ke

1.	A solid body of constant heat capacity `1J//^@C` is being heated by keeping it contact with reservoirs in two ways: (i) Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies same amount of heat. (ii) Sequentially keeping in contact with 8 reservoir such that each reservoir supplies same amount of heat. In both the cases body is brought from initial temperature `100^C` to final temperature `200^@C`. Entropy change of the body in the tow cases respectively is :A. `ln 2, 4ln2`B. `ln2, ln 2`C. `ln2, 2ln, 2`D. `2ln 2n, 8ln2`
Answer» Correct Answer - B Since entropy is a state function, therefore change in entropy in both the processes should be same. Therefore correct option is (2)

Discussion

No Comment Found

Related InterviewSolutions

At room temperature `(300K)`, the rms speed of the molecules of a certain diatomic gas is found to be `1930 m//s`. Can you gusess name of the gas? Find the temperature at which the rms speed is double of the speed in part one `(R = 25//3 J// mol -K)`
Comprehension-1 Two closed identical conducting containers are found in the laboratory of an old scientist. For the verification of the gas some experiments are performed on the two boxes and the results are noted. Experiment 1. When the two containers are weighed `W_(A) = 225 g, W_(B) = 160 g` and mass of evacuated container `W_(C) = 100 g`. Experiment 2. When the two containers are given same amount of heat same temperature rise is recorded. The pressure changes found are `Deltap_(A) = 2.5 atm, Deltap_(B) = 1.5 atm`. Required data for unknown gas: `|(underset("molar mass")(Mono)",He,Ne,Ar,Kr,Xe,Rd),(,4g,20g,40g,84g,131g,222g),(underset(molar mass)(Dia),H_(2),F_(2),N_(2),O_(2),CI_(2),),(,2g,19g,28g,32g,71g,)|` Identify the type of gas filled in container `A` and `B` respectively.A. Mono, MonoB. Dia, DiaC. Mono, DiaD. Dia, Mono
Two containers of equal volume enclose equal masses of hydrogen and helium at `300K`. Find (i) the ratio of pressure and (ii) the ratio of total `K.E.` of all the molecules of the two gases.
Find the average momentum of molecules of hydrogen gas in a container at temperature `300K`.
Comprehension-1 Two closed identical conducting containers are found in the laboratory of an old scientist. For the vertification of the gas some experiments are performed on the two boxes and the results are noted. Experimenet 1. When the two containers are weighed `W_(A) = 225tg, W_(B) = 160 g` and mass of evacuated container `W_(C) = 100g`. Experiment 2. When the two containers are given same amount of heat same temperature rise is recorded. The pressure changes found are `DeltaP_(A) = 2.5 atm, Deltap_(B) = 1.5 atm`. Required data for unknown gas: `|(underset("molar mass")(Mono)",He,Ne,Ar,Kr,Xe,Rd),(,4g,20g,40g,84g,131g,222g),(underset(molar mass)(Dia),H_(2),F_(2),N_(2),O_(2),CI_(2),),(,2g,19g,28g,32g,71g,)|` Identify the gas filled in the container `A` and `B`.A. `N_(2), Ne`B. `He, H_(2)`C. `O_(2),Ar`D. `Ar,O_(2)`
A gaseous mixture enclosed in a vessel of volume V consists of one mole of a gas A with `gamma=(C_p//C_v)=5//3` and another gas B with `gamma=7//5` at a certain temperature T. The relative molar masses of the gasses A and B are 4 and 32, respectively. The gases A and B do not react with each other and are assumed to be ideal. The gaseous mixture follows the equation `PV^(19//13)=constant`, in adiabatic processes. (a) Find the number of moles of the gas B in the gaseous mixture. (b) Compute the speed of sound in the gaseous mixture at `T=300K`. (c) If T is raised by 1K from 300K, find the `%` change in the speed of sound in the gaseous mixture. (d) The mixtrue is compressed adiabatically to `1//5` of its initial volume V. Find the change in its adaibatic compressibility in terms of the given quantities.
A gaseous mixture consists of 16g of helium and 16 g of oxygen. The ratio `(C_p)/(C_v)` of the mixture isA. `1.59`B. `1.62`C. `1.4`D. `1.54`
A cylinder containing an ideal gas ( see figure ) and closed by a movable pistong is submerged in an ice- water mixture. The pistone is quickly pushed down from position (1) to position (2)( process `AB)`. The piston is held at position `(2)` until the gas is again at `0^(@)C` ( processs `BC)`. Then the pistone is slowly raised back to position (1) ( process `CA)` Which of the following `P-V` diagram will correctly represent the processes `AB, BC` and `CA` and the cycle `ABCA?`A. B. C. D.
In a mixture of nitrogen and helium kept at room temperarture. As compared to a helium molecule nitrogen molecule hits the wallA. With greater average speedB. with smaller average speedC. with greater average kinetic energyD. with smaller average kinetic energy
The average translational kinetic energy of nitrogen gas molecule is `0.02eV (1eV - 1.6 xx 10^(-19)J)`. Calculate the temperatuire of the gas. Boltzmann constant `k = 1.38 xx 10^(-23) J//K`.

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment