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sp asked in Science & MathematicsChemistry · 8 years ago

Silicon has an enthalpy of fusion of 50.2 kJ/mol and a melting point of 1414 C. What is the entropy of fusion?

Silicon has an enthalpy of fusion of 50.2 kJ/mol and a melting point of 1414 degrees celcius. What is the entropy of fusion for Silicon?

Alrighty, so I'm really stuck on this question.

Here's what (I think) I know:

I use Delta(G) = Delta(H) - (T)Delta(S)

I realized I'm looking for Delta S (entropy) so I don't know what to do there.

I can rearrange the formula into: Delta(S)=Delta(H) - Delta(G) / (T)

But I don't have Delta (G)...

Aaaand the reaction is NOT spontaneous.

Please help. Please. Thanks in advance.

3 Answers

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  • HPV
    Lv 7
    8 years ago
    Favorite Answer

    For an equilibrium process (such as melting),

    delta S = delta H / T = 50,200 J / 1687 K = 29.8 J/K

  • ?
    Lv 4
    4 years ago

    Melting Enthalpy

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  • ?
    Lv 4
    4 years ago

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