t10-haber process

Question 1

what is the forward reaction of the haber process

Answer 1

exothermic

Question 2

where is nitrogen taken from for the haber process

Answer 2

the air

Question 3

where is hydrogen taken from in the haber process

Answer 3

natural gas (methane)

Question 4

what is ammonia used for

Answer 4

nitrogen based fertilisers for growing food

Question 5

describe the process

Answer 5

1. H2+N2 are put into the reaction vessel in the presence of an iron catalyst
   2.reaction vessel has conditions 450degrees and 200atm
   3.ammonia is made. it has a low BP
   4.mixture of N2+H2 and ammonia goes into condenser, which is colder.
   5.ammonia turns gaseous and condenses into liquid ammonia
2. H2+N2 stay gaseous as they have higher BPs
   7.N2+H2 are recycled back to the reaction vessel to be reused

Question 6

how was the temperature for the process chosen

Answer 6

% yield
-low temperature achieves a higher yield because forward reaction is exothermic

RoR
–high temperatures achieves a higher RoR; particles have more frequent collisions

cost
-high temp uses more energy so cost increases

Compromise
-temp is chosen between rate and yield

Question 7

how was the pressure for the process chosen

Answer 7

% yield
-high pressure achieves higher yield because there are fewer product molecules

RoR
-high pressure gives higher RoR because there are more frequent collisions

cost
-high pressure needs more energy so costs increase

Compromise
-chosen temp between rate and yield