If the entropy of a system increases, what is the effect on Gibbs Free Energy at
Practice Questions
Q1
If the entropy of a system increases, what is the effect on Gibbs Free Energy at constant temperature?
ΔG increases
ΔG decreases
ΔG remains constant
ΔG becomes zero
Questions & Step-by-Step Solutions
If the entropy of a system increases, what is the effect on Gibbs Free Energy at constant temperature?
Step 1: Understand what entropy is. Entropy is a measure of disorder or randomness in a system.
Step 2: Know that Gibbs Free Energy (ΔG) is a measure of the energy available to do work in a system at constant temperature and pressure.
Step 3: Remember the Gibbs Free Energy equation: ΔG = ΔH - TΔS, where ΔH is the change in enthalpy, T is the temperature, and ΔS is the change in entropy.
Step 4: If the entropy (ΔS) of the system increases, the term TΔS (temperature times change in entropy) also increases.
Step 5: Since ΔG = ΔH - TΔS, an increase in TΔS means that ΔG will decrease if ΔH remains constant.
Step 6: A decrease in ΔG indicates that the reaction is more favorable or spontaneous.
Entropy and Gibbs Free Energy – The relationship between entropy (S) and Gibbs Free Energy (G) is described by the equation ΔG = ΔH - TΔS, where an increase in entropy (ΔS > 0) at constant temperature (T) leads to a decrease in Gibbs Free Energy (ΔG < 0), indicating a more favorable reaction.
