UPSEE Solved Model Paper 6

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Question : 91 of 150

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Which of the following reactions corresponds to the definition of enthalpy of formation?

C(diamond) + O2 (g) → CO2 (g)
C(graphite) + O2 (l) → CO2 (g)
C(graphite) + O2 (g) → CO2 (g)
C(g) + O2 (g) → CO2 (g)

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