Question

Standard molar enthalpy of formation of CO₂ is equal to 

(A) Zero 

(B) The standard molar enthalpy of combustion of gaseous carbon 

(C) The sum of standard molar enthalpies of formation of CO and O₂ 

(D) The standard molar enthalpy of combustion of carbon (graphite)

Answer 1

Correct option (D) The standard molar enthalpy of combustion of carbon (graphite)

Explanation:

Standard molar heat enthalpy (H°) of a compound is equal to its standard heat of formation from most stable states of initial components.