Using the data: $\mathrm{O}$ $-141$, $\mathrm{S}$ $-200$, $\mathrm{F}$ $-328$, $\mathrm{Cl}$ $-349$ $\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$ (first electron gain enthalpies), select the correct statements.

1. AThe difference between $\mathrm{Cl}$ and $\mathrm{F}$ is $21\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$
2. BEnergy released when 2 mol of $\mathrm{F}$ atoms each gain an electron is 656 kJ
3. C$\mathrm{S}$ releases more energy than $\mathrm{O}$
4. DThe value for $\mathrm{F}$ is more than 3 times that of $\mathrm{O}$