For two species, A and B, with a positive enthalpy change of mixing:

(a) Are the like interactions or the unlike interactions stronger? Explain.

(b) If pure species A and B are mixed adiabatically, will the temperature (increase, stay the same, decrease, or cannot tell)? Explain.

(c) If pure species A and B are mixed isothermally, what will be the sign of Q? Explain.

(d) If an equamolar mixture of species A and B is mixed adiabatically with pure A, will the temperature (increase, stay the same, or decrease)? Explain.