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 :A. `+X_(1)kJ mol^(-1) `B. `-X_(2)kJ mol^(-1)`C. `+X_(3)kJ mol^(-1)`D. `-X_(4) kJ mol^(-1)`

Consider the following reactions : (a) `H_((aq))^(+)+OH_((aq))^(-)=H_(

1.	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 :A. `+X_(1)kJ mol^(-1) `B. `-X_(2)kJ mol^(-1)`C. `+X_(3)kJ mol^(-1)`D. `-X_(4) kJ mol^(-1)`
Answer» Correct Answer - B

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