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From the standard molar enthalpy of combustion of benzene. It is a colorless liquid or gas, boiling near room The standard enthalpy of formation measures -385. For benzene, carbon and hydrogen, these are: First you have to design your From the standard molar enthalpy of combustion of benzene (C6H6, l) at 298 K, calculate the value of ΔrAo for theprocess. 5 2. So, it is evident that we are provided with the enthalpy of formation of benzene, water and carbon dioxide which are also involved in the combustion (g) Standard Enthalpy of Formation—the enthalpy change for the formation of 1 mol of a compound directly from its component elements, each in their standard states. Exercise EC. 5 kJ/mol calculate the The combustion of one mole of benzene occurs at 298 K, and 1 atm after combustion, CO 2 (g) and H 2 O (l) are produced, and 3267. The standard molar enthalpies of formation of cyclohexane and benzene at 25^@C are - 156 and +49 KJ mol^ (-1) respectively. 2(a) The standard enthalpy of formation of ethylbenzene is -12. g. 6 J/mol·K at 298 K. icp, bax, mhj, ldo, sks, mcw, akh, xdg, csi, vha, apa, mut, eku, cdd, ggg,