Question

Nitrogen reacts with hydrogen to give ammonia. Calculate the volume of the ammonia gas formed when nitrogen reacts with 6 litres of hydrogen. All volumes measured at s.t.p.

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Answer

[By Lussac’s law]

N2         +       3H2   →   2NH3

1 vol      :       3 vol   →  2 vol

To calculate the volume of ammonia gas formed.

H2     :     NH3

3        :     2

6        :     x

⇒ x = 6 × 2\over 3

Hence, volume of ammonia gas formed is 4 lts

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