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Energy Release in Reactions

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Heat is given off when hydrogen burns in air according to the equation:2H2 + O2 ---> 2H2) What is responsible for the heat? I
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2. asked by Jessica
3. 4,206 views
If 15.0 g of Pb(s) reacts in a car battery, the amount of energy released isdelta H is -315.9 KJ
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2. asked anonymously
3. 18 views