Free Energy and Equilibrium

AP Chemistry· difficulty 4/5

Use ΔG° = -RT ln K with R = 8.314 J/(mol·K).

ΔG° < 0 → K > 1 ΔG° = -RT ln K ΔG° > 0 → K < 1 ΔG° = 0 → K = 1

A reaction has ΔG° = -10. kJ/mol at 298 K. What does this imply for K?

  • A

    K < 1

  • B

    K > 1

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  • C

    K = 1

  • D

    K = 0

Explanation

ΔG° = -RT ln K; negative ΔG° gives ln K > 0, so K > 1 and products are favored.

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