The hydrolysis of ATP back to ADP has a standard Gibbs freeenergy change of -31

Question

The hydrolysis of ATP back to ADP has a standard Gibbs freeenergy change of -31 kJ/mol at human body temperature, 310 K. Thisrepresents the maximum non-expansion work (electrical, chemical, orbiological) that can be extracted from a mole of ATP. How manymoles of ATP are required by an organism to synthesize a mole of aparticular amino acid whose synthesis reactions have a combinedDG = + 56.0 kJ/mol?
The hydrolysis of ATP back to ADP has a standard Gibbs freeenergy change of -31 kJ/mol at human body temperature, 310 K. Thisrepresents the maximum non-expansion work (electrical, chemical, orbiological) that can be extracted from a mole of ATP. How manymoles of ATP are required by an organism to synthesize a mole of aparticular amino acid whose synthesis reactions have a combinedDG = + 56.0 kJ/mol?

Explanation / Answer

Really all you need to do is divide the amount of energyneeded by the energy ATP can offer. 56/31=1.8 moles ATP needed.

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