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Question

Calculate the ΔH for conversion of C (diamond) to C (graphite) when the following reactions are given:
C(diamond)+O2CO2(g);ΔH=94.5Kcal
C(graphite)+O2CO2(g);ΔH=94Kcal

A
-188.5 K.cal
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B
+188.5 K.cal
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C
+0.5 K.cal
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D
-0.5 K.cal
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