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Given that - 2C(s)+2O(2)(g)rarr 2CO(2)...

Given that -
`2C(s)+2O_(2)(g)rarr 2CO_(2)(g) Delta H = -787 KJ`
`H_(2)(g)+ 1//2O_(2)(g)rarr H_(2)O(l) Delta =-286 KJ`
`C_(2)H_(2)(g)+(5)/(2)O_(2)(g)rarr H_(2)O(l) Delta H=-1310 KJ`
Heat of formation of acetylene is :-

A

`-1802` kJ

B

`+1802` kJ

C

`-800` kJ

D

`+237` kJ

Text Solution

Verified by Experts

The correct Answer is:
D
Aim: `2C+H_(2(g))rarrC_(2)H_(2(g))`.
eq. (ii) + eq. (iii) `rarr`eq. (iv) - eq. (i)
find the required result.
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