In the reaction,\ $ 4 \mathrm{NH}_{3(g)}+5 \mathrm{O}_{2(g)} ightarrow 4 \mathrm{NO}_{(g)}+6 \mat

Question

In the reaction,\ $ 4 \mathrm{NH}_{3(g)}+5 \mathrm{O}_{2(g)} ightarrow 4 \mathrm{NO}_{(g)}+6 \mathrm{H}_{2} \mathrm{O}_{(g)} $\ when 1 mole of ammonia and 1 mole of oxygen are made to react to completion,\

Professor PC Thomas Classes · Answer

(c) :        \ Since 4 mol of $\mathrm{NH}_{3}$ reacts with 5 mol of $\mathrm{O}_{2}$ thus, 1 mol of $\mathrm{NH}_{3}$ reacts with $\frac{5}{4}=1.08 \mathrm{~mol}$ of $\mathrm{O}_{2}$.\ The number of moles of oxygen present is 1 mol .\ ∴ Oxygen is limiting reagent.\ So, $1-5 x=0$ or, $x=\frac{1}{5}=0.2$\ Left $\mathrm{NH}_{3}=1-4 	imes 0.2=0.2 \mathrm{~mol}$\ $\mathrm{H}_{2} \mathrm{O}$ produced $=6 	imes 0.2=1.2 \mathrm{~mol}$\ NO produced $=4 	imes 0.5=0.8 \mathrm{~mol}$\