Which of the following expressions correctly relates ΔG, ΔH, and ΔS?
Practice Questions
1 question
Q1
Which of the following expressions correctly relates ΔG, ΔH, and ΔS?
ΔG = ΔH + TΔS
ΔG = ΔH - TΔS
ΔG = TΔS - ΔH
ΔG = ΔH + ΔS
The correct relation is ΔG = ΔH - TΔS.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following expressions correctly relates ΔG, ΔH, and ΔS?
Solution: The correct relation is ΔG = ΔH - TΔS.
Steps: 5
Step 1: Understand the symbols. ΔG represents the change in Gibbs free energy, ΔH represents the change in enthalpy (heat content), and ΔS represents the change in entropy (disorder).
Step 2: Recognize that these three quantities are related in thermodynamics, which studies energy changes in chemical reactions.
Step 3: Learn the formula that connects these three quantities: ΔG = ΔH - TΔS.
Step 4: In this formula, T represents the temperature in Kelvin. It shows how temperature affects the relationship between enthalpy and entropy.
Step 5: Remember that a negative ΔG indicates a spontaneous process, meaning the reaction can occur without external energy.
