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26 September, 07:07

Consider the following generic chemical equation:

A + B → C + D

Reactant A contains 85.1 J of chemical energy. Reactant B contains 87.9 J of chemical energy. Product C contains 38.7 J of chemical energy. If the reaction absorbs 104.3 J of chemical energy as it proceeds, how much chemical energy must product D contain? Explain your answer.

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  1. 26 September, 08:41
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    With the given equation, we could say that each mole A or B can produce 1 mole of C and D. To solve this we can represent this problem algebraically as follows:

    (38.7+x) - (87.9+85.1) = - 104.3J

    where x is the amount of energy that D possesses. Solve x and you shoudl get 31 J.
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