Spontaneous Reaction Video Lessons

Concept

# Problem: An endothermic reaction for which the system exhibits an increase in entropy.A. ΔG will be negative.B. ΔG will be positive.C. ΔG will decrease with raising the temperature.D. ΔG will increase with raising the temperature.An endothermic reaction for which the system exhibits a decrease in entropy.A. ΔG will be positive.B. ΔG will decrease with raising the temperature.C. ΔG will be negative.D. ΔG will increase with raising the temperature.An exothermic reaction for which the system exhibits a decrease in entropy.A. ΔG will increase with raising the temperature.B. ΔG will be positive.C. ΔG will decrease with raising the temperature.D. ΔG will be negative.

###### FREE Expert Solution

We’re being asked to determine which of the given statements is true for a reaction given the reaction conditions.

Recall that when ΔH and ΔS are given, we can determine the spontaneity of the reaction based on their signs

We can use the Punnett square shown below:

Exothermic reactions: lose energy and involve bonds forming; ΔH (negative)
Endothermic reactions: gain energy and involve bonds breaking; +ΔH (positive)

• ΔG < 0 or ΔG = (–) the reaction is spontaneous
ΔG = 0 the reaction is at equilibrium
• ΔG > 0 or ΔG = (+) → the reaction is non-spontaneous

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###### Problem Details

An endothermic reaction for which the system exhibits an increase in entropy.

A. ΔG will be negative.

B. ΔG will be positive.

C. ΔG will decrease with raising the temperature.

D. ΔG will increase with raising the temperature.

An endothermic reaction for which the system exhibits a decrease in entropy.

A. ΔG will be positive.

B. ΔG will decrease with raising the temperature.

C. ΔG will be negative.

D. ΔG will increase with raising the temperature.

An exothermic reaction for which the system exhibits a decrease in entropy.

A. ΔG will increase with raising the temperature.

B. ΔG will be positive.

C. ΔG will decrease with raising the temperature.

D. ΔG will be negative.