how is energy released from ATP?

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liemluji
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How is energy released from ATP?I thought hydrolysis of ATP using water breaks down ATP into ADP and Pi by breaking the phosphate bond?But I keep seeing things in the book saying energy is released when inorganic phosphate forms bonds with water...I feel like they mean the same thing but those two were part of mutiple choice questions and apparently the answer is 'when inorganic phosphate forms bond with water' and not 'when ATP splits into ADP and Pi'Help me out plsThanks
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Firefly13
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It isn't ATP breaking down and releasing a Pi that releases the energy, it's what occurs afterwards that releases the energy. Pi interacts with water, taking the -OH, so the free H can then bind with the 'broken' ATP molecule to form ADP. The formation of the bonds is what releases energy. If ATP didn't break down there wouldn't be an inorganic phosphate for the water to bond with so energy can't be released. Hopefully that makes sense!
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