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Oxidising power of chlorine in aqueous s...

Oxidising power of chlorine in aqueous solution can be determined by the parameters indicated below :
`1/2Cl_(2)(g) overset(1/2 Delta_("diss")H^(Θ))(rarr)Cl(g) overset(Delta_(eg)H^(Θ))(rarr)Cl^(-)(g) overset(Delta_("hyd")H^(Θ))(rarr)Cl^(-)(aq)`
The energy involved in the conversion of `1/2 Cl_(2)(g)` to `Cl^(-)(aq)`
(using the data, `Delta_("diss")H_(Cl_(2))^(Θ)=240" kJ mol"^(-1), Delta_("eg") H_(Cl)^(Θ)=-349" kJ mol"^(-1), Delta_("hyd")H_(Cl^(-))^(Θ)=-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)`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH_(1/2 Cl_(2) rarr Cl^(-))=1/2 DeltaH_("Diss")^(Θ)+Delta_(Eg)H^()+Delta_("hyd")H^(Θ)=1/2 xx240+(-349)+(-381) =-610" kJ/mol"`
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