# For an ideal solution, the correct option is:Option 1)$\Delta_{mix}S = 0$ at constant T and POption 2)$\Delta_{mix}V \neq 0$ at constant T and POption 3) $\Delta_{mix}H = 0$ at constant T and POption 4)$\Delta_{mix}G = 0$ at constant T and P

For an ideal solution, the Gibbs free energy is always negative, thus their mixing is always spontaneous.

The volume change of the mixing of ideal solutions is zero.

An ideal solution is one in which the enthalpy of the solution is zero

$\therefore \Delta_{mix}H = 0$ at constant T and P

Option 3 is correct.

Option 1)

$\Delta_{mix}S = 0$ at constant T and P

Option 2)

$\Delta_{mix}V \neq 0$ at constant T and P

Option 3)

$\Delta_{mix}H = 0$ at constant T and P

Option 4)

$\Delta_{mix}G = 0$ at constant T and P

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