The reaction C (graphite) + O2 (g) → CO2 (g) + 393.5 kJ mol-1 repre

1.	The reaction C (graphite) + O2 (g) → CO2 (g) + 393.5 kJ mol-1 represents the formation of CO2 and also combustion of carbon. Write the ΔH° value of the two processes.
Answer» (i) The standard enthalpy of formation of carbon dioxide is -393.5 kilojoule per mole of CO₂. That is, ΔH°_f(CO₂, g) = -393.5 kJ mol^-1 (ii) The standard enthalpy of combustion of carbon is -393.5 kilo joule per mole of carbon. That is ΔH°_comb (C) = -393.5 kJ mol^-1

The reaction C (graphite) + O2 (g) → CO2 (g) + 393.5 kJ mol-1 represents the formation of CO2 and also combustion of carbon. Write the ΔH° value of the two processes.

Answer»

(i) The standard enthalpy of formation of carbon dioxide is -393.5 kilojoule per mole of CO₂. That is, ΔH°_f(CO₂, g) = -393.5 kJ mol^-1

(ii) The standard enthalpy of combustion of carbon is -393.5 kilo joule per mole of carbon. That is

ΔH°_comb (C) = -393.5 kJ mol^-1

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The reaction C (graphite) + O2 (g) → CO2 (g) + 393.5 kJ mol-1 represents the formation of CO2 and also combustion of carbon. Write the ΔH° value of the two processes.

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