Home/ Questions/Q 432072
Next
In Process
Jiya Sekhon
Asked: 2022-11-08T09:08:09+05:30 In:

If `x_(1),x_(2) and x_(3)` are enthalpies of H-H , O=O and O-H bonds respectively , and `x_(4)` is the enthalpy of vaporisation of water , estimate the standard enthalpy of combustion of hydrogen:
A. `x_(1) + (x_(2))/(2) – 2x_(3) + x_(4)`
B. `X_(1) + (x_(2))/(2) – 2x_(3) – x_(4)`
C. `x_(1) + (x_(2))/(2) – x_(3) + x_(4)`
D. `2x_(3) – x_(1) – (x_(2))/(2) – x_(4)`

If `x_(1),x_(2) and x_(3)` are enthalpies of H-H , O=O and O-H bonds respectively , and `x_(4)` is the enthalpy of vaporisation of water , estimate the standard enthalpy of combustion of hydrogen:
A. `x_(1) + (x_(2))/(2) – 2x_(3) + x_(4)`
B. `X_(1) + (x_(2))/(2) – 2x_(3) – x_(4)`
C. `x_(1) + (x_(2))/(2) – x_(3) + x_(4)`
D. `2x_(3) – x_(1) – (x_(2))/(2) – x_(4)`
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – B
    `H_(2)+1/2 O_(2) rarr H_(2)O(l)`
    `DeltaH=x_(1)+x_(2)/2-2x_(3)`
    `H_(2)O(l) rarr H_(2)O(g)`
    `DeltaH=x_(1)+x/2-2x_(3)-x_(4)`

    • 0