Question

A: Phosphocreatine is used by your muscle cells to store energy. The dephosphorylation of phosphocreatine, like that of ATPATP, is a highly exergonic reaction with ΔG∘′=−10.3kcal/molΔG∘′=−10.3kcal/mol:

Phosphocreatine+H2O⇌creatine+PiPhosphocreatine+H2O⇌creatine+Pi

ATP+H2O→ADP+PiATP+H2O→ADP+Pi
Choose a reaction for the transfer of phosphate from phosphocreatine to ADPADP to generate creatine and ATPATP.

ANS: P-creatine+ADP→creatine+ATP

B: Calculate ΔG∘′ΔG∘′ for the reaction. Express your answer using one decimal place.

C: If ΔHΔHDH = -50.0 kJkJ and ΔSΔSDS = -0.300 kJ/KkJ/K , the reaction is spontaneous below a certain temperature. Calculate that temperature.

Express your answer numerically in kelvins.

Answer 1