AP Physics 2
9.4 The First Law of Thermodynamics
9.1 Kinetic Theory of Temperature and Pressure
An ideal gas is enclosed in a thermally insulated cylinder fitted with a piston. The piston is allowed to move outward, expanding the gas. On a microscopic scale, gas molecules collide elastically with the moving piston. Which of the following claims correctly describes the effect of this expansion on the temperature of the gas and provides the correct physical justification?
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