S $($rhombic$)+$ O$2($g$)$SO$2($g$)$ DrH$\backslash$deg $=294\mathrm{.}1$kJ

S $($monoclinic$)+$ O$2($g$)$SO$2($g$)$ DrH$\backslash$deg $=295\mathrm{.}4$kJ

The enthalpy of allotropic transformation from monoclinic to rhombic sulfur form is