Question

Ammonia, NH₃, gas is manufactured by the Haber process where hydrogen gas is directly combined with nitrogen gas.

N₂ (g) + H₂(g)--------------NH₃(g)

1. How many liters of nitrogen are needed to produce 45 L of ammonia at STP?

Answer 1

The reaction is:

$N_2 +3H_2 \to 2NH_3$

From 1 mol of N2 2 mol NH3 is prepared in perfect presence of H2

Mol ratio is 1:2

1mol of any ideal gas at STP contains 22.4L of the ideal gas.

Hence, liters of nitrogen needed to produce 45 L of ammonia at STP will be,

$=45L NH_3 ×\frac{1LN_2}{2LNH_3} = 22.5LN_2$