Thermodynamics

$2 \mathrm{H}_2 \mathrm{O}_{2(\ell)} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(\ell)}+\mathrm{O}_{2(\mathrm{~g})}$

$\mathrm{NH}_{3(\mathrm{~g})}+\mathrm{HCl}_{(\mathrm{g})} \rightarrow \mathrm{NH}_4 \mathrm{Cl}_{(\mathrm{s})}$

$\quad \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NH}_{3(\mathrm{~g})}$