Nitrogen and hydrogen gas react to form ammonia gas. At a certain temperature and pressure 1.2 L of N2 reacts with 3.6 L of H2. If all of both gases are consumed what is the final volume of NH3 produced?

1 Answer
Apr 17, 2017

The final volume is 2.4" L"

Explanation:

Here is the balanced equation

N_2+3H_2= 2NH_3

At STP, 1 mole has a volume of 22.4 Liters. To do a dimensional analysis conversion from Liters to moles:

(N" Liters")/1(1" mole")/(22.4" Liters") = N/22.4" moles"

Please observe that Liters and moles vary directly, therefore, we can simply multiply each of the coefficients (that represent moles) by 1.2" L" to obtain the volumes:

(1.2" L")N_2+(3.6" L")H_2= (2.4" L")NH_3

It does not really matter what number of moles that we have as long as we maintain the 1:3:2 relationship.