The equilibrium constant, K p , for the reaction 2 NO₂ (g) N₂O₄ (g) is 10.0 at 25 C. Calculate D G for this reaction (R = 8.314 J/mol K).

Question

Quizplus · Accepted Answer

The equation for calculating ΔG from Kp is:

ΔG = -RTlnKp

where R is the gas constant (8.314 J/mol K), T is the temperature in Kelvin, and ln is the natural logarithm.

Substituting the given values:

ΔG = - (8.314 J/mol K) x (298 K) x ln(10.0)
ΔG = -5.70 kJ

Therefore, the answer is C.

The Equilibrium Constant, K P , for the Reaction 2