The internal energy of the combustion products is ____________________ compared to that of reactants?
Correct answer: B. Less
- A. More
- B. Less
- C. Equal
- D. More or less; (depends on the state of fuel.)
Explanation
For combustion under the usual comparison conditions, chemical energy is released, leaving the products at a lower internal-energy level than the reactants. This is why the combustion reaction has a negative heat effect.
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