Reaction of ethanamine(g) and HCl(g)
Write the equation for the reaction between ethanamine and hydrogen chloride gas
$CH_3CH_2NH_2 (g)$ $+$ $HCl (g)$ $\rightarrow$ $CH_3CH_2NH_3^+ Cl^-(s)$
Two colourless gases form a white solid, ethanammonium chloride (smoke = solid particles!)