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Physics · THERMODYNAMICS
हिन्दीAn ideal gas undergoes an isothermal expansion from state \( (P_1, V_1) \) to \( (P_2, V_2) \). Which of the following expressions correctly represents the heat \( \Delta Q \) absorbed by \( \mu \) moles of the gas?
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Correct answer · Option B
\( \Delta Q = \mu R T \ln (\frac{P_1}{P_2}) \)
Explanation
In an isothermal process of an ideal gas, \( \Delta U = 0 \). By the First Law, \( \Delta Q = W = \mu R T \ln(V_2/V_1) = \mu R T \ln(P_1/P_2) \).
