(Answered) Chemical energy and mechanical energy work are

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Chemical energy and mechanical energy (work) are interconvertable:

a)If the free energy of ATP hydrolysis (ΔG`) under cellular conditions is -12 kcal/mol, how much ATP (in moles) would I need to burn to lift a 1 kg weight from the ground to my desk 1 meter high? Assume your muscles are 100% efficient in this case.

b)If I could harness the energy of light without any loss to perform this task, how many photons at 600 nm (47 kcal/mol) would I need to absorb?

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