Chemistry - Habour Process 0.0 / 5 ? ChemistryHaber and industrial processesGCSEAQA Created by: LunaShomeiRoseCreated on: 01-12-18 16:15 What is made during this process? Ammonia 1 of 36 How is amonia made? Three hydrogen and one nitrogen 2 of 36 Complete equation for ammonia: N2 + 3H -> 2NH3 3 of 36 How many mols are formed of ammonia? 2 4 of 36 It can also break down to form hydrogen gas because it's a __ reaction Reverable 5 of 36 Meaning it will never go to ____tion Completion 6 of 36 What is ammonia mainly used for? As fertilizer 7 of 36 Because we've found a cheap and easy way to make ammonia, the amount of crop yields ___ Increase (this has meant increase in population) 8 of 36 Why is nitrogen easy to get? It makes up most of the air (78%) 9 of 36 Why do we use nitrogen? It's unreactive and plants cant use it so we need to react it with something that plants can use 10 of 36 Nitrogen requires high ___/___ to react Temperature/pressure 11 of 36 Where do we get hydrogen from? made by steam reforming of natural gas 12 of 36 Is it a renewable method? No. It's non-renewable 13 of 36 We can also get hydrogen from ____ waste or the ____ of water. biological waste. Electrolysis of water (expensive. only renewable if use a renewable source like wind) 14 of 36 These methods are both r___ Renewable 15 of 36 The reaction to produce ammonia occurs at ___ temperature room. 16 of 36 This means its very happens at a ___ rate Slow 17 of 36 The haber process uses t___, p____ and c___ to speed up reaction temperature, pressure, catalysis 18 of 36 Since it's a reversible reaction, we want to shift the reaction towards the ___ to make more of it products (ammonia) 19 of 36 The reaction is __othermic as more energy is released then absorbed exothermic 20 of 36 This means ___ temperatures are better to form ammonia Lower 21 of 36 How many mols react to form the two mols of annomia? (H3 + N) 4 22 of 36 This means, pressure should be ___ to increase yeild Higher 23 of 36 In the process, we have the nitrogen from ___ and hydrogen from ___ Nitrogen from air. Hydrogen from natural gas. 24 of 36 They're mixed together (in a 3:1 ratio) and they're h____ and p___ heated and pressurized 25 of 36 Its heated to ___ 450 degrees 26 of 36 They're compressed to a pressure of __ 200atm 27 of 36 They are the introduced to reaction vessel and out the vessel will be... a mixture of all three gasses 28 of 36 The vessel has an __ catalyst iron 29 of 36 It's cooled down and so ammonia ____, forming a liquid that can be extracted condenses 30 of 36 Because there's still loads of nitrogen and hydrogen present, they are... heated back up and pressurized back into reaction vessel 31 of 36 Why is a high pressure used? It increases the yeild 32 of 36 What are the disadvantages of this? (why don't we go higher?) Expensive, dangerous 33 of 36 Why is 450 degrees used fro temperature? (high temp) Although it gives lower yield, it speeds reaction up, activates catalysts 34 of 36 Why is an iron cataslys used? Speeds up reaction, iron isn't fastest but is cheap (efficient) 35 of 36 The process is a compromise between yield, c__, and r__ of r___ cost and rete of reaction 36 of 36
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