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Chemistry(Please help)

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1) Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is

2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227oC

Using delta Ho = 81.2 kJ and delta So = 128 J/K, calculate the value of the equilibrium constant for this reaction.

I do not know how to start this problem or what formula I should use.

  • Chemistry(Please help) -

    dGo = dHo - TdSo
    Then dGo = -RTlnK

  • Chemistry(Please help) -

    So for delta G= delta H - T delta S it would be delta G= 81200 J/K - 500K(128J/k)

    This would equal 17200. Did I do this correctly so far before I move on?

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