FG$11$ H$2$O$($g$)<==>$ H$2($g$)+1/2$ O$2($g$)+118\mathrm{.}08$ kJ mol$-12300$ K $$ H$202300$ K $1\mathrm{.}00$ X $0\mathrm{.}0623$: $0\mathrm{.}02$: $0\mathrm{.}005(0\mathrm{.}015-+/-0\mathrm{.}025)$