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Physics · Unit 1 · Heating processes · Kinetic particle model and specific heat capacity

Explain how a system with thermal energy has the capacity to do mechanical work.

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Question 1

A cylinder contains 0.50 mol of an ideal gas at 450 K. The gas is allowed to expand against a movable piston while in thermal contact with a heat reservoir. Explain how the thermal energy of the gas enables it to perform mechanical work on the piston during this expansion.

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Question 2

Refer to the scenario below. Explain how the thermal energy of the steam is converted into mechanical work by the piston.

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Question 3

A sealed cylinder contains gas at high temperature. A movable piston sits at the top of the cylinder. Explain how the thermal energy of the gas enables it to do mechanical work on the piston.

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