Glucose phosphorylation can be accomplished through the two steps below (values at 298 K)

CHEMISTRY · Subjective · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

Glucose phosphorylation can be accomplished through the two steps below (values at 298 K). Glucose +

P_i

\rightarrow

Glucose-6-P

\Delta G^\circ = +13.8\,\text{kJ mol}^{-1}

ATP + H

_2

\rightarrow

ADP +

P_i

\Delta G^\circ = -30.5\,\text{kJ mol}^{-1}

In one or two sentences, explain how combining these reactions leads to an overall process that is spontaneous under standard conditions.