If 315cal of heat is given to the system, and the system does 20cal of work, find the change in internal energy.(a) 295cal(b) 335cal(c) 0 cal(d) 335JI have been asked this question by my college director while I was bunking the class.I need to ask this question from First Law of Thermodynamics in division Thermodynamics of Physics – Class 11

If 315cal of heat is given to the system, and the system does 20cal of

1.	If 315cal of heat is given to the system, and the system does 20cal of work, find the change in internal energy.(a) 295cal(b) 335cal(c) 0 cal(d) 335JI have been asked this question by my college director while I was bunking the class.I need to ask this question from First Law of Thermodynamics in division Thermodynamics of Physics – Class 11
Answer» Correct choice is (a) 295cal To elaborate: The first LAW states that ΔU=ΔQ – ΔW = 315 – 20 = 295cal. Work is POSITIVE as it is done by the system. HEAT is positive as it is supplied to the system.

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