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`(A) to (Q)`, Here.s law states that enthalpy change in a reaction remains the same whether the reaction takes placce in one step or in several steps.
`(B) to (R )`, Combustion reactions are exothermic.
`( C) to (Q) , (DeltaH_("vap"))/("Boiling point in K") = 88 JK^(-1)"mol"^(-1)`
`(D) to (P), 2.303 log P_(2)/P_(1) =(DeltaH_("vap"))/R (T_(2)-T_(1))/(T_(1)T_(2))`
In a Clausius -Clapeyron equation.
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