1.

Oxidizing power of chlorine in aqueous solution can be determined by the parameters indicatedbelow: (1)/(2)Cl_(2)overset((1)/(2) Delta_("disso")H^(c-))(rarr)Cl(g) overset(Delta_(cg) H^(c-))(rarr) Cl^(-)(g)overset(Delta_(hyd)H^(c-))(rarr) Cl^(-) (aq)The energy involved inthe conversion of (1)/(2)Cl_(2)(g) toCl^(-) (aq)( using the data,Delta_(disso) H_(Cl_(2))^(c-)= 240 kJmol^(-1),Delta_(eg)H = - 349 kJ mol^(-1) Delta_(hyd)H_(cl) ^(c-) = - 381kJ mol^(-1)) will be

Answer»

`- 850kJ MOL^(-1)`
`+120kJ mol^(-1)`
` +152kJ mol^(-1)`
`- 610 kJmol^(-1)`

Solution :For the process `(1)/(2) Cl_(2)(G) rarr Cl^(-) (aq) `,using the given steps,
`DeltaH =(1)/(2)Delta_(diss)H_(Cl_(2))+ Delta_(eg) Cl_+Delta_(hyd) H_(Cl^(-))`
`= ( 240)/(2) - 349-381kJmol^(-1)`
`=120 -730=-610 kJ mol^(-1)`


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