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Which of the following equilibrium will ...

Which of the following equilibrium will shift left on increasing temperature.
`(i) " " H_(2)O(g) hArr +1//2 O_(2)(g)`
`(ii) " " CO_(2)(g) +C(s) hArr CO(g)`
`(iii) " " C(s, "diamond") hArr C(s, "graphite")`

A

Only (i)

B

Both (i) and (ii)

C

Only (iii)

D

None

Text Solution

Verified by Experts

The correct Answer is:
C
Out of diamond and graphite, at a given temperature graphite has lesser energy and the process `[Delta H^(@) ._(f) C ("graphite" )=0]`.
`C(s,"diamond") hArr C(s, "graphite")`
is an exothermic process. As such an increase in temperature shifts the equilibrium in the backward direction.
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