At , three reactions have the following standard free-energy changes: Reaction A:…

CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

298\,\text{K}

, three reactions have the following standard free-energy changes: Reaction A:

\Delta G^\circ = -12\,\text{kJ}\cdot\text{mol}^{-1}

Reaction B:

\Delta G^\circ = +5\,\text{kJ}\cdot\text{mol}^{-1}

Reaction C:

\Delta G^\circ = -30\,\text{kJ}\cdot\text{mol}^{-1}

Which sequence correctly ranks the reactions from the LARGEST to the SMALLEST equilibrium constant,

K

? (a)

B > A > C

(b)

C > B > A

(c)

C > A > B

(d)

A > C > B