The reaction of hydrogen and oxygen gases produces 18.0 g of water and releases 68.2 kcal of heat. How much energy is required to decompose 18.0 g of water into hydrogen and oxygen gases?

Chemistry: Matter and Change
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Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
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Chapter15: Energy And Chemical Change
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The reaction of hydrogen and oxygen gases produces 18.0 g of water and releases 68.2 kcal of heat. How much energy is required to decompose 18.0 g of water into hydrogen and oxygen gases?

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