Enthalpy Of Hydrogenation Of Ethene Provided From Table 10 Case Study

Register to read the introduction… Marit used the values of enthalpies of combustion from Table 12. (a) Calculate the value for the enthalpy of hydrogenation of ethene obtained using the average bond enthalpies given in Table 10. [2] ....................................................................... ....................................................................... ....................................................................... ....................................................................... (b) Determine the value for the enthalpy of hydrogenation of ethene using the values for the enthalpies of combustion of ethene, hydrogen and ethane given in Table 12. [2] ....................................................................... ....................................................................... ....................................................................... ....................................................................... (c) Suggest one reason why John’s answer is slightly less accurate than Marit’s answer and calculate the percentage difference. [2] ....................................................................... ....................................................................... ....................................................................... …show more content…
John’s hypothesis was that it would be the same. Determine why the use of average bond enthalpies is less accurate for the cyclohexene equation shown above, than it was for ethene. Deduce what extra information is needed to provide a more accurate answer. [2] .................................................................. .................................................................. ..................................................................