For a given reaction,Δ_rH = -26.6 kJ mol^-1 and Δ_rS = -77.0 J K^-1mol^-1.The reaction is spontaneous ________.Assume that Δ_rH and Δ_rS do not vary with temperature. A)at T 345 K B)at T 298 K D)at T

Question

For a given reaction,Δ_rH = -26.6 kJ mol^-1 and Δ_rS = -77.0 J K^-1mol^-1.The reaction is spontaneous ________.Assume that Δ_rH and Δ_rS do not vary with temperature. A)at T > 345 K B)at T < 345 K C)at T > 298 K D)at T < 298 K E)at all temperatures

Quizplus · Accepted Answer

The reaction is spontaneous when ΔG = ΔH - TΔS < 0. Solving for T, we get T < ΔH/ΔS = 345 K.

For a Given Reaction,ΔrH = -26

For a Given Reaction,Δ_rH = -26