Molar heat capacities: A certain amount of ideal monatomic gas is maintained at constant volume as it is cooled from 455K to 405 K. This feat is accomplished by removing 400 J of heat from the gas. How much work is done by the gas during this process? The ideal gas constant is R = 8.314 J/mol ∙ K.

Question

Quizplus · Accepted Answer

When a gas is maintained at constant volume and heat is removed or added, the work done by the gas is zero because there is no volume change. Work done by a gas is given by the formula W = PΔV, where P is pressure and ΔV is the change in volume. Since ΔV = 0 in this case, W = 0.

Molar Heat Capacities: a Certain Amount of Ideal Monatomic Gas