# Problem: Which of the following reactions have a positive ΔSrxn? Check all that apply.2A(g)+B(g) → C(g)A(g)+B(g) → 3C(g)2A(g)+3B(g) → 4C(g)2A(g)+B(s) → 3C(g)

###### FREE Expert Solution

We’re being asked to determine the reactions that will have a positive ΔSrxn. Recall that if:

• ΔS > 0 or ΔS = (+); entropy is increased

• ΔS < 0 or ΔS = (–); entropy is decreased

Remember that phase changes lead to a change in entropy: Also, recall that an increase in the number of gas molecules in the reaction also leads to an increase in entropy.

99% (494 ratings) ###### Problem Details

Which of the following reactions have a positive ΔSrxn? Check all that apply.

2A(g)+B(g) → C(g)

A(g)+B(g) → 3C(g)

2A(g)+3B(g) → 4C(g)

2A(g)+B(s) → 3C(g)

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