Considere as reações

I. $\mathrm{KCLO}{}_3(\mathrm{c})\to \mathrm{KCL}(\mathrm{c})+\frac{3}{2}\mathrm{O}{}_2(\mathrm{g})$

II. $\mathrm{CaCO}{}_3(\mathrm{c})\to \mathrm{CaO}(\mathrm{c})+\mathrm{CO}{}_2(\mathrm{g})$

III. $\mathrm{NH}{}_4\mathrm{NO}{}_3(\mathrm{c})\to 2\mathrm{H}{}_2\mathrm{O}(\mathrm{g})+\mathrm{N}{}_2\mathrm{O}(\mathrm{g})$

IV. $\mathrm{NH}{}_4\mathrm{Cl}(\mathrm{c})\to \mathrm{NH}{}_3(\mathrm{g})+\mathrm{HCl}(\mathrm{g})$

Qual das afirmações seguintes esta ERRADA?