A sample of ammonia (NH3) gas is completely decomposed to nitrogen and hydrogen gases over heated iron wool. If the total pressure after the reaction is 1510mmHg, calculate the partial pressure of N2 and H2.

Dear Nitin ,

  2 NH3---->N2 + 3 H2

let NH3  = x mole

so, N2 = x/2 mole

H2= 3x/2 mole

mole frac. H2 = (3/2)/(1 + 3/2 + 1/2)

mole frac. N2 = (1/2)/(1 + 3/2 + 1/2)

Partial press H2 = 1510 * mole frac. H2

Partial press N2 = 1510 * mole frac. N2

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