Haber Challenge N3C

emily parris
Mind Map by emily parris, updated more than 1 year ago
emily parris
Created by emily parris over 5 years ago


The Haber Challenge

Resource summary

Haber Challenge N3C
  1. Chemical Equation
    1. N (g)+3H (g) = 2NH (g) (+heat)
    2. Haber Process diagram
      1. Raw Materials
        1. Nitrogen
          1. Obtained easily from the air
          2. Hydrogen
            1. Obtain from natural gas or cracking hydrocarbons
          3. Structure and Bonding
            1. Ammonia
              1. Has a trigonal pyramidal shape which has no charge. It is a Simple covalent structure that has a low melting and boiling point as not a lot of energy is needed to break the bonds. They have a fixed size and the forces of ascttraction between the molecules are weak intermolecular forces.
              2. Nitrogen
                1. It is a non- metal with 5 electrons in it's outer-shell.The bonds are very strong
                2. Hydrogen
                  1. Non- metal with one electron in its outer-shell.
                3. Operating Conditions
                  1. Increase in temp
                    1. Decreases the yield of ammonia as it moves the reaction in an endothermic reaction which in this case is the backwards reaction
                      1. Increase the rate as the molecules have more energy so therefore move faster meaning they collide with more force and more often
                      2. Increase in pressure
                        1. The amount of ammonia increases as the reaction moves in the direction of the least number of molecules, in this case the reaction moves in the forward direction
                          1. speeds up the rate at which the equilibrium is reached as the number of particles in the same volume is increases therefore there are more collisions per second
                          2. Adding a catalyst
                            1. there is no affect od the amount of ammonia produced
                              1. Increases the rate at which equilibrium is increased as it provides an alternative route of lower activation energy
                              2. Increase of nitrogen concentration
                                1. increases the yield of ammonia as it unbalances the equilibrium so the reaction moves in the forward direction in order to remove the excess nitrogen
                                  1. Increase the rate as more nitrogen particle are in the same volume hence more collisions per second
                                2. Chemical tests
                                  1. How to make 30,000 tons a year
                                    1. N +3H = 2NH
                                      1. 30,000 tons of 2NH needs 24706 tons of nitrogen & 5294.1 tons of hydrogen
                                    2. Hydrogen gas
                                      1. If you put lit splint over hydrogen gas it will make a squeaky pop
                                      2. Ammonia
                                        1. turns damp litmus paper blue
                                        2. Nitrogren
                                          1. Will put out a lit splint
                                        3. Uses of product
                                          1. Fertiliser, bleach, paper pulp, pharmaceuticals, explosives
                                          2. Reaction Energetics
                                            1. An exothermic reaction
                                              1. Enthalpy Change calculations 450 x 4.18 x 30,000 =31,350,000 31,350,000/20= 1,5667,500
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