A fixed amount of an ideal monatomic gas is maintained at constant volume as it is cooled by 50 K.This feat is accomplished by removing 400 J of energy from the gas.How much work is done by the gas during this process?
A)0 J
B)400 J
C)-400 J
D)-200 J
E)200 J

Question

Quizplus · Accepted Answer

Since the gas is maintained at constant volume, the work done by the gas is zero. The energy removed from the gas is used to decrease the internal energy of the gas, which is given by ΔU = -400 J (negative sign because energy is being removed). Therefore, the correct choice is A) 0 J.

A Fixed Amount of an Ideal Monatomic Gas Is Maintained