Chemistry - Thermochemistry Question with Solution | TestHub

$\mathrm{CaO}(\mathrm{s})+{\mathrm{CO}}_2(\mathrm{g})\to {\mathrm{CaCO}}_3(\mathrm{s})$

$\frac{1}{2}{\mathrm{Br}}_2(\ell )+\frac{1}{2}{\mathrm{H}}_2(\mathrm{g})\to \mathrm{HBr}(\mathrm{g})$

${\mathrm{N}}_2(\mathrm{g})+2{\mathrm{H}}_2(\mathrm{g})+\frac{3}{2}{\mathrm{O}}_2(\mathrm{g})\to {\mathrm{NH}}_4{\mathrm{NO}}_3(\mathrm{s})$

$\frac{1}{2}{\mathrm{I}}_2(\mathrm{s})+\frac{1}{2}{\mathrm{H}}_2(\mathrm{g})\to \mathrm{HI}(\mathrm{g})$