1.

For a given exthermic reaction , K_(p) nd K_(p)are the equilibrium constants at temperature T_(1) and T_(2) respectively . Assumbing that heat of reaction is constant in temperature range between T_(1) and T_(2)it is readily observed that

Answer»

<P>` K_(p) gt K_(p)'`
` K_(p) lt K'_(p)`
`K_(p) = K'_(p)`
` K_(p) = 1/(K'_(p)) `

Solution :According to van't Hoff equation ,
` log = (K'_(p))/(K_(p))= -(DeltaH)/(2.303 R) (1/T_(2)-1/T_(1))`
For EXOTHERMIC reaction, `Delta H=-ve`
Also ,as `T_(2)gt T_(1), (1/(T_(2)) - 1/T_(1)) = - ve `
` :. log = (K'_(p))/(K_(p)) = -ve or log K'_(p) - - log K_(p) = -ve`
i.e.,` log .K'_(p) lt log K_(p) or K'_(p)lt K_(p) or K_(p) gt K'_(p)`


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