Answer:
Two design criteria for the design of the ammonia making process are;
1) Sustainable hydrogen production by renewable energy
2) Sustainable use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water
Explanation:
Ammonia is produced from natural gas in the following process;
H₂ + RSH → RH + H₂S
H₂S + ZnO → ZnS + H₂O (Waste water)
CH₄ + H₂O → CO + 3H₂
CO + H₂O → CO₂ + H₂
Ammonia is then produced by reacting the produced hydrogen with nitrogen in the presence of a catalyst in a process known as the Haber-Bosch process as follows;
3H₂ + N₂ → 2NH₃
The
The design criteria for the design of the ammonia making process therefore as follows;
1) Sustainable use of renewable energy to produce hydrogen gas from the electrolysis of water
2) Use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water.
Answer:
Increase D ⇒ rightward shift
Increase E ⇒ rightward shift
Increase F ⇒ leftward shift
Decrease D ⇒ leftward shift
Decrease E ⇒ leftward shift
Decrease F ⇒ rightward shift
Triple D and reduce E to one third ⇒ no shift
Triple both E and F ⇒ no shift
Explanation:
Changes in the concentrations of reactants y products affect to the equilibrium. In this case, D and E are reactants and F is the product.
When a change in the factors affecting equilibrium occur, the system will react in order to counteract the change imposed.
- If a increase of reactant occur, the system will tend to produce more products (<em>rightward shift</em>). For example: increase D, increase E. In contraposition, if a decrease of reactant occur, the system will produce more reactants (<em>leftward shift</em>). For example: decrease D, decrease E.
- If a increase of product occur, the system will tend to produce more reactants (<em>leftward shift</em>). For example: increase F. In contraposition, if a decrease of product occur, the system will produce more products (<em>rightward shift</em>). For example: decrease F.
- If we change both reactants and products concentration in the same amount, the net change is zero, so there is <em>not shift</em>. For example: Triple D and reduce E to one third (D x 3 and E/3, there is not change in the total amount of reactants) ; Triple both E and F (E x 3 and F x 3, the net change is zero).
Answer:
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Explanation:
Both diamond and SiO₂ are network solids. Their atoms are all joined together so a crystal of either diamond or SO₂is one giant molecule.
Structure
In diamond, each C atom is covalently attached to four other C atoms.
The structure of SiO₂ is like that of diamond. The difference is that there is an O atom between each atom of Si.
Properties
Both substances are
- High-melting
- Hard
- Insoluble in both polar and nonpolar solvents
- Poor conductors of electricity
