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Question

Standard molar enthalpy of formation of CO2 is equal to

A
Zero
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B
The standard molar enthalpy of combustion of gaseous carbon
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C
The sum of standard molar enthalpies of formation of CO and O2
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D
The standard molar enthalpy of combustion of carbon (graphite)
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Solution

The correct option is D The standard molar enthalpy of combustion of carbon (graphite)
Standard molar heat enthalpy (H) of a compound is equal to its standard heat of formation from most stable states of initial components.

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