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Which of the following is true about an exothermic reaction?

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Question: Which of the following is true about an exothermic reaction?

Options:

  1. ΔH is positive
  2. ΔH is negative
  3. ΔH is zero
  4. ΔH can be either positive or negative

Correct Answer: ΔH is negative

Solution: 

In an exothermic reaction, the enthalpy change (ΔH) is negative because heat is released.

Which of the following is true about an exothermic reaction?

Practice Questions

Q1
Which of the following is true about an exothermic reaction?
  1. ΔH is positive
  2. ΔH is negative
  3. ΔH is zero
  4. ΔH can be either positive or negative

Questions & Step-by-Step Solutions

Which of the following is true about an exothermic reaction?
  • Step 1: Understand what an exothermic reaction is. It is a type of chemical reaction that releases heat.
  • Step 2: Learn about enthalpy change, which is a measure of heat content in a system.
  • Step 3: In an exothermic reaction, the system loses heat to the surroundings.
  • Step 4: Because heat is released, the enthalpy change (ΔH) is negative.
  • Step 5: Remember that a negative ΔH indicates that energy is being released during the reaction.
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