1) (20 points) Use the standard enthalpies of the following reactions: C2H4(g)+3O2(g)2CO2(g)+2H2O(l)C(s)+O2(g)CO2(g)1/2O2(g)+H2(g)H2O(l)H2(g)2H(g)C(grahite)C(g)H=1411KJH=393.51KJH=285.85KJH=435.93KJH=761.68KJ and the bond enthalpy of CH bond that is equal to 415.85KJ to calculate the bond enthalpy of C=C bond. (2) ( 10 points) a) Knowing that H=f(P,T), write the equation for the total differential of H. b) Derive the equation for (P/T)H in terms of (H/P)T and Cp 1) (20 points) Use the standard enthalpies of the following reactions: C2H4(g)+3O2(g)2CO2(g)+2H2O(l)C(s)+O2(g)CO2(g)1/2O2(g)+H2(g)H2O(l)H2(g)2H(g)C(grahite)C(g)H=1411KJH=393.51KJH=285.85KJH=435.93KJH=761.68KJ and the bond enthalpy of CH bond that is equal to 415.85KJ to calculate the bond enthalpy of C=C bond. (2) ( 10 points) a) Knowing that H=f(P,T), write the equation for the total differential of H. b) Derive the equation for (P/T)H in terms of (H/P)T and Cp