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Given : (i) C("graphite") + O(2)(g) ra...

Given :
(i) `C("graphite") + O_(2)(g) rarr CO(g) ,Delta_(r )H^(@) = xkJ mol^(-1)`
(ii) `C("graphite") + 1/2 O_(2)(g) rarr CO_(2)(g), Delta_(r )H^(@) = ykJ mol^(-1)`
(iii) `CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g) , Delta_(r )H = z kJ mol^(-1)`
Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct ?

A

`x=y-z`

B

`y=2z-x`

C

`x=y+z`

D

`z=x+y`

Text Solution

Verified by Experts

The correct Answer is:
C
`C_("graphite")+O_2(g) to CO_2 (g) Delta, H^@ = xkJ //mol `…(i)
`C_(("graphite")) + 1/2 O_2(g) to CO(g) Delta_rH^@ = ykJ//mol`…(ii)
`CO(g) + 1/2 O_2 (g) to CO_2(g) Delta_r H^@ = zkJ//mol`…(iii)
(i) = (ii) + (iii)
` x = y + z`.
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