From the following data, calculate the enthalpy change for the combustion of cyclopropane at298 K.The enthalpy of fomrationof CO_(2)(g), H_(2)O(l)and propene (g) are -393.5, -285.8 and 20.42kJ mol^(-1)respectively. The enthalpy of isomerisation of cyclopropane to propeneis -33.0 kJ mol^(-1)

From the following data, calculate the enthalpy change for the combust

1.	From the following data, calculate the enthalpy change for the combustion of cyclopropane at298 K.The enthalpy of fomrationof CO_(2)(g), H_(2)O(l)and propene (g) are -393.5, -285.8 and 20.42kJ mol^(-1)respectively. The enthalpy of isomerisation of cyclopropane to propeneis -33.0 kJ mol^(-1)
Answer» Solution :We AIM at `: (##PR_CHE_01_XI_C06_E35_010_S01.png" width="80%">`+ (9)/(2) O_(2)rarr3CO_(2)+3H_(2)O,DELTAH =?` We are given `: (i) C+O_(2) rarr CO_(2),DeltaH= - 393.5 KJ ` (II) `H_(2) + (1)/(2) O_(2) rarr H _(2)O, DeltaH = - 285kJ` (iii) `3C + 3H_(2)rarr CH_(3) - CH = CH_(2),DeltaH= 20.42kJ` (iv)` rarrCH_(3)- CH=CH_(2), DeltaH = -33.0 kJ ` 3` xx` Eqn. (i) `+3 xx` Eqn.(ii) `+` Eqn (iv) -Eqn. (iii) gives the requiredresult.