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Diborane is a potential rocket fuel that...

Diborane is a potential rocket fuel that undergoes combustion according to the reaction,
`B_(2)H_(6)(g) +3O_(2)(g) rarr B_(2)O_(3)(g) +3H_(2)O(g)`
From the following data, calculate the enthalpy change for the combustion of diborane:

Text Solution

Verified by Experts

`B_(2)H_(6(g))+3O_(2(g))rarr B_(2)O_(3(s))+3H_(2)O_((g)), DeltaH=?`
Multiply `eq.(2)` and `(3)` by 3, add `eqs.(1),(2) and (3)` and then subtract `eq.(4)` from that
`2B_((s))+(3)/(2)O_(2(g))rarr B_(2)O_(3(s)), DeltaH=-1273kJmol^(-1).....(1)`
`3H_(2(g))+(3)/(2)O_(2(g)) rarr 3H_(2)O_((l)), DeltaH=-286xx3 ....(2)`
`ul (3H_(2)O_((l)) rarr 3H_(2)O_((g)), DeltaH=44xx3 .....(3))`
`2B_((s))+3H_(2(g))+3O_(2(g)) rarr B_(2)O_(3(s))+3H_(2)O_((g)),DeltaH=-1999`
`ul ({:(2B_((s)),+3H_(2(g)),rarr,B_(2)H_(6(g)),,DeltaH=36),(-,-,,-," -"):})`
`B_(2)H_(6(g))+3O_(2(g))rarr B_(2)O_(3(s))+3H_(2)O_((g)), DeltaH=-2035kJ mol^(-1)`
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Diborane is a potential rocket fuel which undergoes combustion according to the reaction, B_(2)H_(6) (g) + 3O_(2) (g) rarr B_(2) O_(3) (s) + 3H_(2) O (g) From the following data, calculate the enthalpy change for the combustion of diborane: (i) 2 B (s) + ((3)/(2)) O_(2) (g) rarr B_(2) O_(3) (s) , Delta H = 0 1273 k J//mol (ii) H_(2) (g) + ((1)/(2)) O_(2) (g) rarr H_(2) O (l), Delta H = -286 kJ//mol (iii) H_(2) O (l) rarr H_(2)O (g) Delta H = 44 kJ//mol (iv) 2B (s) + 3H_(2) (G) rarr B_(2) H_(6) (g), Delta H = 36 kJ//mol

Diborane is a potentail rocket fuel which undergoes combusion according to the reaction B_(2)H_(6)(g)+3O_(2)(g)rarrB_(2)O_(3)(s)+3H_(2)O(g) From the following data, calculate the enthalpy change for the combustion of diborane 2B(s)+(3//2)O_(2)(g)rarrB_(2)O_(3)(s) DeltaH= -1273 kJ mol^(-1) H_(2)(g)+(1//2)O_(2)(g)rarrH_(2)O(1) " "Delta H= -286 kJ mol^(-1) H_(2)O(1)rarrH_(2)O(g)" "DeltaH=44 kJ mol^(-1) 2B(s)+3H_(2)(g)rarrB_(2)H_(6)(g)" "Delta H= 36kJ mol^(-1)

Diborane is a potential rocket fuel which undergoes combustion according to the reaction, B_(2)H_(6)(g)+3O_(2)(g)toB_(2)O_(3)(s)+3H_(2)O(g) from the following data, the enthalpy change for the combustion of diborane will be : 2B(s)+(3)/(2)O_(2)(g)toB_(2)O_(3)(s)," "DeltaH=-1273 " kJ" H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)," "DeltaH=-286 " kJ" H_(2)O(l)toH_(2)O(g)," "DeltaH=44" kJ" 2B(s)+3H_(2)(g)toB_(2)H_(6)(g)," "DeltaH=46" kJ"

Diborane is a potential rocket fuel which undergoes combustion according to the equation B_2H_6(g)+3O_2(g)toB_2O_3(s)+3H_2O(g) Calculate the enthalpy change for the combustion of diborane. Given (i) 2B(s)+3/2O_2(g)toB_2O_3(s), DeltaH=-1273 kj per mol (ii) H_2(g)+1/2O_2(g)toH_2O(I), DeltaH=-286 kj per mol (iii) H_2O(I)toH_2O(g), DeltaH=44 kj per mol (iv) 2B(s)+3H_2(g)toB_2H_6(g), DeltaH=36 kj per mol

Knowledge Check

  • Diborane is a potential rocket fuel which undergoes combustion according to the reaction: B_(2)H_(6)(g) + 3O_(2)(g) to B_(2)O_(3) (s) + 3H_(2)O (g) From the following data, calculate the enthalpy change for the combustion of diborane.

    A
    `-2035 kJ mol^(-1)`
    B
    `-2045 "kj mol"^(-1)`
    C
    `-2135 "kJ mol"^(-1)`
    D
    `-2285 "kJ mol"^(-1)`

  • Diborane is a potential rocket fuel which undergoes combustion according to the reaction, B_(2)H_(6)(g)+3O_(2)(g)toB_(2)O_(3)(s)+3H_(2)O(g) from the following data, the enthalpy change for the combustion of diborane will be : 2B(s)+(3)/(2)O_(2)(g)toB_(2)O_(3)(s)," "DeltaH=-1273 " kJ" H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l)," "DeltaH=-286 " kJ" H_(2)O(l)toH_(2)O(g)," "DeltaH=44" kJ" 2B(s)+3H_(2)(g)toB_(2)H_(6)(g)," "DeltaH=46" kJ"

    A
    `-2079 " kJ" " mol"^(-1)`
    B
    `-1091 " kJ" " mol"^(-1)`
    C
    `-2045 " kJ" " mol"^(-1)`
    D
    `-762 " kJ" " mol"^(-1)`

  • Diborane is potentia rocket fuel which undergoes combustion acording to the equation B_2H_6(g) +3O_2(g) rarr B_2O_3(g) +3H_2O(g) calculate the enthalpy change for the combustion of diborane.

    A
    (+2305kcal)
    B
    (-2035 kj/mol)
    C
    (+2167 kj/mol)
    D
    (-2167 kj/mol)