Diborane is a potential rocket fuel which undergoes combustion accordingto the reaction: B_(2)H_(6)(g) + 3O_(2)(g) rarr B_(2)O_(3) (s) + 3H_(2)O(s) From thefollowing data , calculate the enthalpy change for the combustion of diborane. 2B(s) +(3)/(2) O_(2) (g) rarr B_(2)O_(3)(s) , DeltaH= - 1273kJ mol^(-1)......(i) H_(2)(g)+(1)/(2)O_(2)(g) rarr H_(2)O(l) , DeltaH = - 286kJ mol^(-1)....(ii)H_(2)O(l) rarr H_(2)O(g), Delta H= 44 kJ mol^(-1)....(iii)2B (s) + 3H_(2)(g) rarr B_(2)H_(6)(g), DeltaH = - 36 kJ mol^(-1).....(iv)

Diborane is a potential rocket fuel which undergoes combustion accordi

1.	Diborane is a potential rocket fuel which undergoes combustion accordingto the reaction: B_(2)H_(6)(g) + 3O_(2)(g) rarr B_(2)O_(3) (s) + 3H_(2)O(s) From thefollowing data , calculate the enthalpy change for the combustion of diborane. 2B(s) +(3)/(2) O_(2) (g) rarr B_(2)O_(3)(s) , DeltaH= - 1273kJ mol^(-1)......(i) H_(2)(g)+(1)/(2)O_(2)(g) rarr H_(2)O(l) , DeltaH = - 286kJ mol^(-1)....(ii)H_(2)O(l) rarr H_(2)O(g), Delta H= 44 kJ mol^(-1)....(iii)2B (s) + 3H_(2)(g) rarr B_(2)H_(6)(g), DeltaH = - 36 kJ mol^(-1).....(iv)
Answer» Solution :Eqn. (i) `+3 xx` Eqn.(III) `+ 3 xx `Eqn. (II) - Eqn. (iv) givesthe required RESULT.