Consider the following reactions : (a) `H_((aq))^(+)+OH_((aq))^(-)=H_(2)O_((l)), Delta H= - X_(1)\
Channel: Doubtnut
Date: 2020-02-02

Consider the following reactions : (a) `H_((aq))^(+)+OH_((aq))^(-)=H_(2)O_((l)), Delta H= - X_(1)\"kJ mol\"^(-1)` (b) `H_(2(g))+(1)/(2)O_(2(g))=H_(2)O_((l)), Delta H= - X_(2)\"kJ mol\"^(-1)` (c ) `CO_(2(g))+H_(2(g))=CO_((g))+H_(2)O_((l))- X_(3)\"kJ mol\"^(-1)` (d) `C_(2)H_(2(g))+(5)/(2)O_(2(g))=2CO_(2(g))+H_(2)O_((l))+X_(4)\"kJ mol\"^(-1)` Enthalpy of formation of `H_(2)O_((l))` is :