If ΔH is the enthalpy change and ΔE is, the internal energy change accompanying a gaseous reaction, then
1
ΔH is always greater than ΔE
2
ΔH < ΔE only if number of mol of gaseous products is greater than the number of mol of gaseous reactants
3
ΔH < ΔE only if number of mol of gaseous products is less than the number of mol of gaseous reactants
4
None of these