Which of the following is a correct expression for Gibbs Free Energy?

Practice Questions

Q1
Which of the following is a correct expression for Gibbs Free Energy?
  1. ΔG = ΔH + TΔS
  2. ΔG = ΔH - TΔS
  3. ΔG = TΔS - ΔH
  4. ΔG = ΔS - ΔH

Questions & Step-by-Step Solutions

Which of the following is a correct expression for Gibbs Free Energy?
  • Step 1: Understand what Gibbs Free Energy (ΔG) is. It is a measure of the energy available to do work in a system at constant temperature and pressure.
  • Step 2: Identify the components of the Gibbs Free Energy equation. ΔG is the change in Gibbs Free Energy, ΔH is the change in enthalpy (total heat content), T is the temperature in Kelvin, and ΔS is the change in entropy (disorder).
  • Step 3: Recognize the relationship between these components. The equation shows how the change in enthalpy and the change in entropy affect the Gibbs Free Energy.
  • Step 4: Write down the correct expression for Gibbs Free Energy: ΔG = ΔH - TΔS.
  • Step 5: Confirm that this expression is widely accepted in thermodynamics.
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