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When the temperature becomes sufficiently high, water vapor starts to decompose into hydrogen gas and oxygen...

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Chemistry

When the temperature becomes sufficiently high, water vaporstarts to decompose into hydrogen gas and oxygen gas according to2H2O(g) A 2H2(g) + O2(g) Using the following data, and assumingthat 6CP is constant for this reaction and has an effective valueof Cp = 18.88 J mol–1 K–1 over the temperature range inquestion,

calculate: (a) the value of the decomposition constant at 1000K

(b) the percent decomposition of water vapor at 1000 K and onebar total pressure.

H2(g) O2(g) H2O(g)

hf (298.15) (kJ mol–1) 0.00 0.00 –241.82

S298.15 o (J K–1 mol–1) 130.684 205.138 188.825

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