Ammonia gas is synthesized by combining hydrogen and nitrogen: 3H2(g) + ϩN2 (g) -> 2NH3 (g)
To produce 562g of NH3, what volume of air (the source of N2) is required if the air is introduced at 29 C and 99.3kPa? (Assume the air sample has 78.1 mol% N2)
No.of moles of Ammonia = 562/17 = 33.06,
Pressure = 99.3×1000/101325 = 0.98 atm
(1 atm = 101325 Pa)
Volume of NH3 = nRT/P = 33.06× 0.0821 × 302/0.98
= 836.4 L
From the chemical reaction,
2 moles Ammonia produced by 1mol Nitrogen
2L Ammonia produced by 1L Nitrogen (According to Avogadro's Law)
836.4 L Ammonia produced by 418.2 L Nitrogen .
Since 100L air contains 78.1L Nitrogen
? <------------- 418.2 L Nitrogen
= 100×418.2/78.1 = 535.467L
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