A frictionless piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0 C. During this volume change, it absorbs 208 J of thermal energy.

Question

A frictionless piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0 C. During this volume change, it absorbs 208 J of thermal energy. Calculate the work done by the system.

Prashant Kotian · Accepted Answer

Correct answer: A. Because the process is maintained at a constant temperature, it is an isothermal process. For an ideal gas, J continuously. By the First Law, . Thus, all 208 J of absorbed heat is exhausted as expansion work: J.

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