Question

2. A and B mix to form an ideal solution. What is the Gibbs energy of A in the old as compared to the Gibbs energy of pure liquid A? How does the Gibbs energy of B(sol) compare to B(pure)? 3. If B is added to pure A what happens to the Gibbs energy of A? 4. Why does the Gibbs energy of the solvent of an ideal solution decrease upon addition of a solute?

Answer 1

Question 2.

$\Delta$G_A = $\Delta$G_A^o + RT lnK

i.e. $\Delta$G_A(sol) > $\Delta$G_A^o(pure)

Now, $\Delta$G_B = $\Delta$G_B^o + RT lnK

i.e. $\Delta$G_B(sol) > $\Delta$G_B^o(pure)

Question 3.

If 'B' is added to pure 'Á', Gibbs energy of A will increase.

Question 4.

The solute will get soluble in the solvent and enlarge the volume of the solution, as a result of which the Gibbs energy of the solvent will be decreased.