Consider the following reaction,which is spontaneous at room temperature. NH₃(g)+ BF₃(g)→ H₃NBF₃(s) One would predict that A)ΔG is negative at all temperatures. B)ΔH is positive and ΔS is negative for the reaction. C)ΔH is negative and ΔS is positive for the reaction. D)ΔH is positive and ΔS is positive for the reaction. E)ΔH is negative and ΔS is negative for the reaction.

Question

Quizplus · Accepted Answer

The reaction is spontaneous at room temperature, indicating ΔG is negative. Since a gas is forming a solid, ΔS is negative. For ΔG to be negative, ΔH must also be negative.

Consider the Following Reaction,which Is Spontaneous at Room Temperature