Using the datas given calculate the heat of formation of ethylene. `C(s)+O_2(g)rarrCO_2(g) ,Delta H=-97300 cal`
`H_2(g)+1/2O_2(g)rarr H_2O(l), Delta H=-68400 cal ,
`C_2H_4(g)+3O_2(g)rarr 2CO_2(g)+2H_2O(l), Delta H=-333000 cal`

H_2O(l)rarr H_2O(g) ,DeltaH=+43.7 KJ H_2O(s) rarr H_2O(l) ,Delta h=+6.05KJ the value of Delta H_(vaporisation) of ice is

Delta H- Delta U for the reaction C_3H_8(g) +SO_2 (g) = 3CO_2 (g) + 4H_2O (g) .

The enthalpy of vapourisation of liquid water using the data: (i) H_2(g) + (1/2) O_2(g) to H_2O(l), DeltaH = -285.77 kJ/mol, (ii) H_2(g) + (1/2) O_2(g) to H_2O(l), DeltaH = -241.84 kJ/mol,

Given: C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393.5kJ 2H_(2)(g)+O_(2)(g)to2H_(2)O(g),DeltaH=-571.6kJ Calculate DeltaH of the reaction: C(s)+2H_(2)O(g)toCO_(2)(g)+2H_(2)(g) .

Calculate the entropy change, at 0^@C for the process H_2O(s) rarr H_2O(I) . Given : At 0^@C , H_2O(s) rarr H_2O(g) , Delta H=51885 J. mol^-1 and H_2O(I) rarr H_2O(g) , Delta H=45860 J. mol^-1 .

Calculate the standard enthalpy of formation of C_(6)H_(6)(l) at 25^(@)C temperature using the given data: C_(6)H_(6)(l)+(15)/(2)O_(2)(g) to 6CO_(2)(g)+3H_(2)O(l),DeltaH^(0)=-781kcal H_(2)(g)+(1)/(2)O_(2)(g) to H_(2)O(l),DeltaH^(0)=-68.32kcal C (s, graphite) +O_(2)(g)toCO_(2)(g),DeltaH^(0)=-94.04 kcal .

Calculate the enthalpy of combustion of ethylene . Given : C_(2) H_(6) (g) + (7)/(2) O_(2) (g) to 2 CO_(2) + 3 H_(2)O (l) , Delta H = = 1562 kJ* mol^(-1) H_(2) (g) + (1)/(2) O_(2) (g) to H_(2) O (l) , Delta H = -286 kJ * mol^(-1) C_(2) H_(4) (g) + H_(2) (g) to C_(2) H_(6) (g) , Delta H = -32 kJ * mol^(-1)

Calculate the enthalpy of formation of liquid ethyl alcohol from the following data. C_(2)H_(5)OH(l)+3O_(2)(g)to2CO_(2)(g)+3H_(2)O(l),DeltaH=-1368kJ C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-393kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH=-287kJ .

Calculate the molar entropy of vaporisation of water , (Given : H_(2)O (l) hArr H_(2)O (g) , Delta H = 40.8 kJ* mol^(-1) )

Using the data provided calculate the multiple bond energy (KJ mol^(-)) of a C-=C bond in c_2H_2 consider the bond energy of a C-H bond is 350 KJ mol^(-1) 2C(s)+H_2(g)rarr C_2H_2(g), Delta H=225KJ mol^(-1) 2C(s)rarr2 C(g), Delta H=1410 KJ mol^(-1) H_2(g)rarr 2H(g), Delta H=330KJ mol^(-1)