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

Chemistry

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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)