140 g of $\mathrm{N}_{2}$ and $14 \mathrm{~g} \mathrm{~H}_{2}$ gas were mixed in a reaction vessel t

Question

140 g of $\mathrm{N}_{2}$ and $14 \mathrm{~g} \mathrm{~H}_{2}$ gas were mixed in a reaction vessel to study the reaction $\mathrm{N}_{2}+3 \mathrm{H}_{2} ightleftharpoons 2 \mathrm{NH}_{3}$\ At equilibrium $90 \%$ of the hydrogen reacted. If the equilibrium pressure is\ 143 kPa , the initial pressure would be\

Professor PC Thomas Classes · Answer

P is proportional to the no. of moles\ $	herefore$ Initial P $=\frac{143}{7.8} 	imes 12=220 \mathrm{kPa}$\