Question

1. You have probably heard the two sayings, "Nothing lasts forever"and "Diamonds are forever". They can't both be right, which one iscorrect?! Calculate the standard free energy change at 298K for theconversion of diamonds to graphite and determine whether or not thereaction is spontaneous under standard conditions:

C(diamond) --> C(graphite);

?Hf°(diamond) = 1.895 kJ/mol; S°(diamond) = 2.337 J mol- 1K-1;S°(graphite) = 5.740 J mol-1K-1.
A. 2.19 kJ; not spontaneous
B. -1.90 kJ; spontaneous
C. -2.90 kJ; spontaneous
D. 1.90 kJ; not spontaneous
E. 4.04 kJ; not spontaneous


2. Even if a processs is “spontaneous”, what other information isneeded to tell if the reaction will actually proceed?

A. Equilibrium constant.
B. Rate of reaction.
C. Reactant pressures
D. Reactant and product pressures
E. Temperature.