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Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below :
`(1)/(2)Cl_(2)(g)overset((1)/(2)Delta_(diss)H^(Theta))rarrCl(g)overset(Delta_(eg)H^(Theta))rarrCl^(-)(g)overset(Delta_(hyd)H^(Theta))rarrCl^(-)(aq)`
The energy involved in the conversion of
`(1)/(2)Cl_(2)(g) " to " Cl^(-)(aq)`
(Using the data,
`Delta_(diss)H_(Cl_(2))^(Theta)=240 kJ mol^(-1)`,
`Delta_(eg)H_(Cl)^(Theta)=-349 kJ mol^(-1)`,
`Delta_(hyd)H_(Cl)^(Theta)=-381 kJ mol^(-1))` will be
A. `-610 kJ mol^(-1)`
B. `-850 kJ mol^(-1)`
C. `+120 kJ mol^(-1)`
D. `+152 kJ mol^(-1)`

1 Answer

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Best answer
Correct Answer - A
`DeltaH=(240)/(2)-349-381`
`=120-349-381=-610kJ//mol`.

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