Standard free-energy data are given for two reactions

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

Standard free-energy data are given for two reactions. Reaction A: M + N

\rightarrow

\Delta G^{\circ}=+10.0\,\text{kcal}\,\text{mol}^{-1}

Reaction B: O

\rightarrow

P + Q

\Delta G^{\circ}=-55.0\,\text{kJ}\,\text{mol}^{-1}

Using

1\,\text{kcal}=4.184\,\text{kJ}

, determine

\Delta G^{\circ}

(in kJ mol

^{-1}

) for the net reaction M + N

\rightarrow

P + Q. (a)

+97\,\text{kJ}\,\text{mol}^{-1}

(b)

-45\,\text{kJ}\,\text{mol}^{-1}

(c)

-13\,\text{kJ}\,\text{mol}^{-1}

(d)

+13\,\text{kJ}\,\text{mol}^{-1}