GATE ME 2019 Set 1 — Question 18
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Thermodynamics → Laws & Properties → Work & Heat in Processes
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Question
During a non-flow thermodynamic process (1-2) executed by a perfect gas, the heat interaction is equal to the work interaction () when the process is
Correct answer
(C) Isothermal
Solution
From the First Law of Thermodynamics for a non-flow process:Given that , it implies that the change in internal energy .For a perfect gas, internal energy is a function of temperature only (). Therefore, implies that the temperature remains constant throughout the process ().A process occurring at constant temperature is called an isothermal process.Hence, the correct option is (C).
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