Question

Nitrogen and hydrogen are mixed in what ratio (molar) to manufacture ammonia?

• A. $3:2$
• B. $3:1$
• C. $2:3$
• D. $1:3$

Answer 1

The correct option is D $1:3$

Haber's process converts atmospheric nitrogen ($N_2$) to ammonia ($N{H}_3$) by a reaction with hydrogen ($H_2$) using a metal catalyst under high temperatures and pressures. The reaction is:

$N_2+3H_2⟶2N{H}_3$ $(\Delta H°=-91.8kJ)or(\Delta H°=-45.8kJ\cdot {mol}^{-1})$

So, nitrogen and hydrogen are mixed in a $1:3$ molar ratio to manufacture ammonia.