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In a calorimetry experiment, what does a negative ΔH indicate?

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Question: In a calorimetry experiment, what does a negative ΔH indicate?

Options:

  1. The reaction is endothermic.
  2. The reaction is exothermic.
  3. No heat exchange occurs.
  4. The system is at equilibrium.

Correct Answer: The reaction is exothermic.

Solution: 

A negative ΔH indicates that the reaction releases heat to the surroundings, classifying it as exothermic.

In a calorimetry experiment, what does a negative ΔH indicate?

Practice Questions

Q1
In a calorimetry experiment, what does a negative ΔH indicate?
  1. The reaction is endothermic.
  2. The reaction is exothermic.
  3. No heat exchange occurs.
  4. The system is at equilibrium.

Questions & Step-by-Step Solutions

In a calorimetry experiment, what does a negative ΔH indicate?
  • Step 1: Understand what ΔH means. ΔH represents the change in enthalpy, which is a measure of heat content in a system.
  • Step 2: Recognize that a negative ΔH value means that the heat content of the system decreases.
  • Step 3: Realize that when heat is released from the system, it goes into the surroundings.
  • Step 4: Conclude that a reaction that releases heat is called an exothermic reaction.
  • Enthalpy Change (ΔH) – ΔH represents the heat change in a reaction; a negative value indicates heat is released.
  • Exothermic Reactions – Reactions that release heat to the surroundings, resulting in a temperature increase in the environment.
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