Problem: Which of the following reactions have a positive ΔSrxn? Check all that apply.A(g) + 2B(g) -->2C(g)2A(g) + B(g) -->C(g)2A(g) + 2B(g) -->5C(g)2A(g) + B(s) -->3C(g)

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Recall that entropy is the degree of chaos or disorder of a system 


Recall that if:

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

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


Recall that an increase in the number of gas molecules in the reaction also leads to an increase in entropy.


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Problem Details

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

A(g) + 2B(g) -->2C(g)

2A(g) + B(g) -->C(g)

2A(g) + 2B(g) -->5C(g)

2A(g) + B(s) -->3C(g)

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