What effect does increasing temperature have on the Gibbs Free Energy of an endothermic reaction?
Practice Questions
1 question
Q1
What effect does increasing temperature have on the Gibbs Free Energy of an endothermic reaction?
ΔG increases.
ΔG decreases.
ΔG remains constant.
ΔG becomes zero.
For an endothermic reaction, increasing temperature generally decreases ΔG, making the reaction more favorable.
Questions & Step-by-step Solutions
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Q
Q: What effect does increasing temperature have on the Gibbs Free Energy of an endothermic reaction?
Solution: For an endothermic reaction, increasing temperature generally decreases ΔG, making the reaction more favorable.
Steps: 8
Step 1: Understand what Gibbs Free Energy (ΔG) is. It tells us if a reaction will happen spontaneously.
Step 2: Know that an endothermic reaction absorbs heat from the surroundings.
Step 3: Remember the formula for Gibbs Free Energy: 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: For an endothermic reaction, ΔH is positive because it absorbs heat.
Step 5: Increasing the temperature (T) in the formula means you are multiplying T by ΔS.
Step 6: If ΔS is positive (which means the disorder increases), increasing T will make the TΔS term larger.
Step 7: A larger TΔS term can make ΔG smaller (less positive or more negative).
Step 8: Therefore, increasing temperature generally decreases ΔG for an endothermic reaction, making it more favorable.
