Chapter 10 (Ammonia)

Question 1

How to get nitrogen gas for Haber process

Answer 1

fractional distillation of liquefied air

Question 2

How to get hydrogen gas for Haber process

Answer 2

Cracking of crude oil fractions

Question 3

What is a reversible reaction

Answer 3

A reaction that can go forward and backward at the same time

Question 4

What is the effect of pressure on the yield of ammonia

Answer 4

-a higher pressure leads to a higher yield of ammonia. It also leads to a faster reaction
-maintaining a high pressure incurs a large cost because it requires expensive equipment and a large amount of electricity
-thus a compromise of 200 atm is used

Question 5

What is the effect of temperature on the yield of ammonia

Answer 5

-a lower temperature leads to a higher yield because it reduces the decomposition of ammonia
-a lower temperature would slow down the reaction
-a compromise of 450 degree Celsius is used

Question 6

What is the purpose of a catalyst

Answer 6

speed up the reaction

Question 7

What is the catalyst for the Haber process

Answer 7

finely-divided iron