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What does the Gibbs free energy change indicate?

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Question: What does the Gibbs free energy change indicate?

Options:

  1. Spontaneity of a reaction
  2. Rate of a reaction
  3. Equilibrium constant
  4. Activation energy

Correct Answer: Spontaneity of a reaction

Solution: 

The Gibbs free energy change indicates the spontaneity of a reaction; a negative value suggests spontaneity.

What does the Gibbs free energy change indicate?

Practice Questions

Q1
What does the Gibbs free energy change indicate?
  1. Spontaneity of a reaction
  2. Rate of a reaction
  3. Equilibrium constant
  4. Activation energy

Questions & Step-by-Step Solutions

What does the Gibbs free energy change indicate?
  • Step 1: Understand that Gibbs free energy is a measure of energy available to do work in a system.
  • Step 2: Know that the Gibbs free energy change (ΔG) is calculated during a chemical reaction.
  • Step 3: Recognize that a negative ΔG value means the reaction can happen on its own without needing extra energy.
  • Step 4: Realize that a positive ΔG value means the reaction is not spontaneous and needs energy to occur.
  • Step 5: Conclude that the Gibbs free energy change helps predict if a reaction will happen naturally.
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