The answer is A. Buildings don't melt when it rains, even if the area is polluted.
A asystem at equilibrium stops
Given -
T = 450K
∆H = 3000J
∆S = 4J/K
Using formula
∆G = ∆H - T∆S
∆G = 3000- 4*450
∆G = 1200 Joule
∆G is positive so the reaction is non spontaneous!
C because the liquid is the pond and the gas is the fog. The water from the pond is changing to gas or fog.