Which of the following conditions will lead to a negative ΔG?

Practice Questions

Q1
Which of the following conditions will lead to a negative ΔG?
  1. High temperature and low ΔH
  2. Low temperature and high ΔH
  3. High temperature and high ΔS
  4. Low temperature and low ΔS

Questions & Step-by-Step Solutions

Which of the following conditions will lead to a negative ΔG?
  • Step 1: Understand what ΔG means. ΔG is the change in free energy of a process.
  • Step 2: Know that a negative ΔG means the process is spontaneous, or can happen on its own.
  • Step 3: Learn about the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.
  • Step 4: Recognize that a high ΔS (increase in disorder) will make TΔS larger, which can help make ΔG negative.
  • Step 5: Realize that a high temperature (T) will also increase the TΔS term, further helping to make ΔG negative.
  • Step 6: Conclude that both high temperature and high ΔS are conditions that favor a negative ΔG.
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