Which of the following statement(s) is/are true?

$\mathrm{\Delta E}=0$ for combustion of ${\mathrm{C}}_2{\mathrm{H}}_6\left(\mathrm{g}\right)$ in a sealed rigid adiabatic container

${\mathrm{\Delta }}_{\mathrm{f}}{\mathrm{H}}^{\circ }$ (S, monoclinic) $\ne 0$

If dissociation energy ${\mathrm{CH}}_4\left(\mathrm{g}\right)$ is 1656 kJ/mol and${\mathrm{C}}_2{\mathrm{H}}_6\left(\mathrm{g}\right)$ is 2812 kJ/mol, then value of C-C bond energy will be 328 kJ/mol

If ${\mathrm{\Delta H}}_{\mathrm{f}}\left({\mathrm{H}}_2\mathrm{O},\mathrm{g}\right)=-242\mathrm{kJ}/\mathrm{mol},{\mathrm{\Delta H}}_{\mathrm{vap}}\left({\mathrm{H}}_2\mathrm{O},1\right)=$$44 \mathrm{kJ}/\mathrm{mol}$ than ${\mathrm{\Delta }}_{\mathrm{f}}{\mathrm{H}}^{\circ }\left({\mathrm{OH}}^{-},\mathrm{aq}\right)\text{ will be }-142$ $\mathrm{kJ}/\mathrm{mol}$