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If x1, x2 and x3 are enthalpies of H -...

If `x_1, x_2 and x_3` are enthalpies of H - H, O = O, 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`

Text Solution

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The correct Answer is:
B
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