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Which one is not equal to zero for an ideal solution?
A
$\Delta H_{mix}$
B
$\Delta S_{mix}$
C
$\Delta V_{mix}$
D
$\Delta P = P_{observed} - P_{Raoult}$
Detailed Solution
For an ideal solution $\Delta H_{mix} = 0$, $\Delta V_{mix} = 0$ and it obeys Raoult's law, so $\Delta P = 0$.
Mixing always increases randomness, so $\Delta S_{mix} \ne 0$ (it is positive).
Mixing always increases randomness, so $\Delta S_{mix} \ne 0$ (it is positive).