A 255 -lb person bicycling vigorously on a stationary bicycle uses 2900 kJ . Par

Question

A 255 -lb person bicycling vigorously on a stationary bicycle uses 2900 kJ .

Part A

If the molar mass of ATP is 507 g/mole, how many grams of ATP are hydrolyzed to provide this amount of energy?

Express your answer to two significant figures and include the appropriate units.

A 255 -lb person bicycling vigorously on a stationary bicycle uses 2900 kJ .

Part A

If the molar mass of ATP is 507 g/mole, how many grams of ATP are hydrolyzed to provide this amount of energy?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Heat relaesed upon hydrolysis of ATP is 30.5 kJ/mol. So to obtain 2900 kJ, amount of ATP required = Energy required by man riding bicycle / Heat supplied per mole of hydrolysis of ATP = 2900/30.5 = 95.08 mol.

Molar mass of ATP = 507 g/mol

So, amount of ATP in 95.08 mol = moles x Molar mass = 507 x 95.08 = 48205.56 grams

Amount ATP to be hydrolyzed to give 2900 kJ = 48205.56 grams

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