Choose the one alternative that best completes the statement or answers the question.
At 2600 K, ΔG° = 775 kJ for the vaporization of boron carbide:
B4C(s)⇌4 B(g) + C(s)
Find ΔG and determine if the process is spontaneous if the reaction vessel contains 4.00 mol B4C(s), 0.400 mol of C(s), and B(g) at a partial pressure of 1.0 × 10-5 atm. At this temperature,RT = 21.6 kJ.
A) ΔG = -270 kJ; spontaneous.
B) ΔG = -220 kJ; spontaneous.
C) ΔG = -270 kJ; nonspontaneous.
D) ΔG = -220 kJ; nonspontaneous.