First slide

Gibb's Helmholtz equation

Question

For isothermal expansion in case of an ideal gas

Easy

A

$Δ G = Δ S$
B

$ΔG = ΔH$
C

$ΔG = - T . ΔS$
D

None of these

Solution

for ideal gas isothermal expansion $ΔH = 0$
$\begin{array}{ll} ∴ ΔG = - T \cdot ΔS \\ where ΔS = nRln (\frac{V_{2}}{V_{1}}) \end{array}$

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