Which of the following reactions has a negative enthalpy change?

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Question: Which of the following reactions has a negative enthalpy change?

Options:

Correct Answer: Respiration

Solution:

Respiration is an exothermic reaction that releases energy, resulting in a negative enthalpy change.

Which of the following reactions has a negative enthalpy change?

Which of the following reactions has a negative enthalpy change?

Step 1: Understand what enthalpy change means. It refers to the heat content of a reaction.
Step 2: Know that a negative enthalpy change means the reaction releases energy.
Step 3: Identify the type of reaction that typically has a negative enthalpy change. Exothermic reactions release energy.
Step 4: Recognize that respiration is an example of an exothermic reaction.
Step 5: Conclude that since respiration releases energy, it has a negative enthalpy change.

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