In carbon dioxide CO2 , there are two carbon-oxygen double bonds. To calculate the bond enthalpy for the carbon-oxygen bond in CO2, we can use the given bond enthalpy values for the carbon-oxygen double bond and single bond.Since there are two carbon-oxygen double bonds in CO2, we can calculate the total bond enthalpy for CO2 as follows:Total bond enthalpy for CO2 = 2 * Bond enthalpy of carbon-oxygen double bond Total bond enthalpy for CO2 = 2 * 799 kJ/mol Total bond enthalpy for CO2 = 1598 kJ/molNow, we can find the average bond enthalpy for a single carbon-oxygen bond in CO2 by dividing the total bond enthalpy by the number of carbon-oxygen bonds:Average bond enthalpy for a single carbon-oxygen bond in CO2 = Total bond enthalpy for CO2 / Number of carbon-oxygen bonds Average bond enthalpy for a single carbon-oxygen bond in CO2 = 1598 kJ/mol / 2Average bond enthalpy for a single carbon-oxygen bond in CO2 = 799 kJ/molTherefore, the bond enthalpy for the carbon-oxygen bond in carbon dioxide CO2 is 799 kJ/mol.