The heat energy required to ionise the following molecules is given as follows N_(2)(g) overset(DeltaH_(1))to H_(2)^(o+)(g),O_(2)(g) overset(DeltaH_(2))to O_(2)^(+)(g) Li_(2)(g) overset(DeltaH_(3)) to Li_(2)^(o+)(g),C_(2)(g) overset(DeltaH_(4))to C_(2)^(o+)(g) The correct decreasing order of energy in terms of heat

The heat energy required to ionise the following molecules is given as

1.	The heat energy required to ionise the following molecules is given as follows N_(2)(g) overset(DeltaH_(1))to H_(2)^(o+)(g),O_(2)(g) overset(DeltaH_(2))to O_(2)^(+)(g) Li_(2)(g) overset(DeltaH_(3)) to Li_(2)^(o+)(g),C_(2)(g) overset(DeltaH_(4))to C_(2)^(o+)(g) The correct decreasing order of energy in terms of heat
Answer» `DeltaH_(1) gt DeltaH_(3) gtDeltaH_(2) gt DeltaH_(4)` `DeltaH_(2) gt DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4)` `DeltaH_(3) gt DeltaH_(4)gt DeltaH_(1) gt DeltaH_(2)` `DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4) gt DeltaH_(2)` SOLUTION :Enthalpy of IONISATION depends upon the size of molecules. LARGER the size lesser will be ionisation energy.