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In a chemical reaction, if the enthalpy change (ΔH) is negative, what does this

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Question: In a chemical reaction, if the enthalpy change (ΔH) is negative, what does this indicate?

Options:

  1. The reaction is endothermic
  2. The reaction is exothermic
  3. The reaction is at equilibrium
  4. The reaction requires energy input

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 chemical reaction, if the enthalpy change (ΔH) is negative, what does this

Practice Questions

Q1
In a chemical reaction, if the enthalpy change (ΔH) is negative, what does this indicate?
  1. The reaction is endothermic
  2. The reaction is exothermic
  3. The reaction is at equilibrium
  4. The reaction requires energy input

Questions & Step-by-Step Solutions

In a chemical reaction, if the enthalpy change (ΔH) is negative, what does this indicate?
  • Step 1: Understand what enthalpy change (ΔH) means. It is a measure of heat energy change during a chemical reaction.
  • Step 2: Recognize that a negative ΔH value indicates that heat is being released.
  • Step 3: Know that when heat is released to the surroundings, the reaction is classified as exothermic.
  • Step 4: Conclude that a negative ΔH means the reaction gives off heat.
  • Enthalpy Change – Enthalpy change (ΔH) indicates the heat absorbed or released during a chemical reaction.
  • Exothermic Reactions – Exothermic reactions are those that release heat, resulting in a negative ΔH.
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