Jade asked in Science & MathematicsChemistry · 2 months ago

At 25 ∘C the reaction from Part A has a composition as shown in the table below.?

Substance Pressure


C2H2(g) 4.15

H2(g) 3.25

C2H6(g) 2.25×10−2

What is the free energy change, ΔG, in kilojoules for the reaction under these conditions?

Express your answer numerically in kilojoules.

1 Answer

  • 2 months ago

    In order to answer this, you need to know what ΔGo for this reaction is, as well as the specific reaction. I'm assuming that the reaction is:

    C2H2(g) + H2(g) <--> C2H6(g). 

    Then, use the equation:

    ΔG = ΔGo + RT ln Q

    ΔG = ΔGo + (8.314 J/molK)(298K) ln (2.25X10^-2) / (4.15) (3.25)

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