Question

If liquids A and B form an ideal solution, then :

• A. the entropy of mixing will be zero
• B. the Gibbs free energy of mixing will be zero
• C. the Gibbs free energy as well as the entropy of mixing both will be zero
• D. the enthalpy of mixing will be zero

Answer 1

Answer: (D)

the enthalpy of mixing will be zero

If liquids $A$ and $B$ form an ideal solution, the enthalpy of mixing is zero.
For ideal solution $\Delta V_{mixing}=0,\Delta H_{mixing}=0$. The Gibbs free energy is always negative and becomes more negative as the temperature is increased.