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12 December, 16:10

Reactant X contains 199.3 J of chemical energy. Reactant Y contains 272.3 J of chemical energy. Product W contains 41.9 J of chemical energy. If the reaction loses 111.6 J of chemical energy as it proceeds, how much chemical energy must product Z contain?

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  1. 12 December, 17:10
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    According to the law of conservation of energy the total energy on both sides of the reaction should be the same so:

    X + Y = W + Z + energy

    199.3 + 272.3 = 41.9 + Z + 111.6

    Z = 471.6 - 153.5

    Z = 318.1 J
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