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Calculate the standard enthalpy of forma...

Calculate the standard enthalpy of formation of acetylena from the following data:
`C(s)+O_(2)(g)to CO_(2)(g), DeltaH^(@)=-393.5KJmol^(-1)`
`H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l),DeltaH^(@)=-285 .8KJmol^(-1)`
`2C_(2)H_(2)(g)+50_(2)(g)to 4Co_(2)(g)+2H_(2)O(l0,`
`DeltaH^(@)=-2598.8KJmol^(-1)`

A

`226.6KJmol^(-1)`

B

`230.5KJmol^(-1)`

C

`233.8KJmol^(-1)`

D

none of these

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