Question

one mole of an ideal gas is allowed to expand at 25 degree celsius till its pressure falls to one- fifth of its original pressure. find out the free energy

Answer 1

$E=−2.303×nRTlog\frac{P_1}{P_2}$

$E=-2.303×1×8.314×298log\frac{1}{0.2}=3.98kJ$

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