Question

Which one of the following is incorrect for ideal solution ?

• A. $\Delta G_{mix}=0$
• B. $\Delta H_{mix}=0$
• C. $\Delta U_{mix}=0$
• D. $\Delta P=P_{obs}-P_{\text{calculated by Rault's law}}=0$

Answer 1

The correct option is A $\Delta G_{mix}=0$

$\begin{array}{cc}\Delta H_{mix}=0& \\ \Delta U_{mix}=0& \\ \Delta V_{mix}=0& \end{array}|$ & $P_{obs}=P_{cal}\text{by Raoult's law}$
But $\Delta G_{mix}\ne 0\Delta S_{mix}\ne 0$
$\Delta G_{mix}=nRT\sum x_{i}ln{x}_i<0$
$\Delta G_{mix}<0$