Question

Use the data below to calculate ΔG for the reaction below at 25 °C when the partial pressures are 3.00 atm of NOCl, 1.00 × 10^−3 atm of NO, and 1.00 × 10^−3 atm of Cl2.

A. ΔG = -RTlnQ
B. ΔG = ΔH - TΔS
C. ΔG = ΔG° + RTlnQ
D. ΔG = ΔG° + RTlnK

Answer 1

To calculate ΔG for a reaction, use the equation ΔG = ΔG° + RTlnK, where ΔG° is the standard free energy change, R is the gas constant, T is the temperature in Kelvin, and K is the equilibrium constant. Substituting the values given in the question into the equation will give you the answer.

Step-by-step explanation:

To calculate the standard free energy change (ΔG) for the reaction, we need to use the equation: ΔG = ΔG° + RTlnQ. Here, Q represents the reaction quotient, which is calculated using the partial pressure of the reactants and products. Since the given equilibrium constant (K) is equivalent to Q at equilibrium, we can use it to calculate ΔG. The correct answer is option D: ΔG = ΔG° + RTlnK.