MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryConcept of Heat and Work
A given mass of gas expands from state A to state B by three paths 1, 2, and 3 as shown in the figure: If w ,w and w respectively, be the work done by the gas along three paths, then (a) w w w (b) w w w
C.W₁ = W₂ = W₃
Explanation
Work is equal to area under P – V graph (when P is plotted along y-axis). As area under graph 3 is maximum and area under graph 1 is minimum, so w3 is maximum and w1 is minimum. ∴ 1 2 3 w w w THERMODYNAMICS AND THERMOCHEMISTRY 31
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