Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation?
Answer
A
Energy is absorbed because the product has more energy than the reactants have.
B
Energy is absorbed because the product has less energy than the reactants have.
C
Energy is lost because the product has more energy than the reactants have.
D
Energy is lost because the product has less energy than the reactants have.
Explanation
The reactants contain 50 J + 35.3 J = 85.3 J of energy altogether. The product contains 104 J, which is 18.7 J more than the reactants. That increase means energy was absorbed during the reaction, so the correct choice is “Energy is absorbed because the product has more energy than the reactants have.”
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