【Daily Question】Theoretical Foundation 2020.05.20
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This post was last edited by Qingse Nianhua on 2020-5-20 08:16. Multiple-choice question: A certain amount of ideal gas starts at temperature T and volume V; it undergoes an adiabatic process during which its volume doubles to 2V. Then it goes through a isobaric process, during which its temperature returns to the initial value. Finally, it goes through an isothermal process to return to its initial state. Then, in this cycle ( ) (A) the net heat absorbed by the gas from the outside world is negative. (B) the net work done by the gas on the outside world is positive. (C) The net heat absorbed by the gas from the surroundings is positive. (D) The internal energy of the gas decreases. Answer: A. Hint: An additional reward will be given to those who can explain the solution process; the answer can be found in the response!
(B) The net work done by the gas on the surroundings is positive.
(A) The net heat absorbed by the gas from the surroundings is negative