ammonia, NH3, Produced in the organ process (nitrogen gas and hydrogen gas are used as starting materials in the reaction) is mainly used as a raw material for fertilizer production. Researchers are looking for alternative processes for ammonia production. Here is a three-step ammonia production process: first step: Electrolysis of molten LiOH to produce Li metal: 4LiOH(l) → 4Li(s) + 2H2O+ O2(g) SECOND STEP: Reaction between Li and nitrogen gas, N2, to form lithium nitride, L3N: 3Li(s) + ½N2(g) → Li3N(s) STEP THREE: Reaction between lithium nitride and water to obtain LiOH and ammonia: Li3N(s) + 3H2O → 3LiOH(l) + NH3(g) The LiOH obtained in step 3 can be recycled and used again in step 1. 1. A. Write the two half-cells of the reaction in step 1 and indicate which half of the oxidation cell is And who is half a courtship cell. 1.B. Here is a table with thermodynamic data for the substances involved in Phase 1 at 750K:
ammonia, NH3, Produced in the organ process (nitrogen gas and hydrogen gas are used as starting materials in the reaction) is mainly used as a raw material for fertilizer production. Researchers are looking for alternative processes for ammonia production. Here is a three-step ammonia production process:
first step:
4LiOH(l) → 4Li(s) + 2H2O+ O2(g)
SECOND STEP: Reaction between Li and nitrogen gas, N2, to form lithium nitride, L3N:
3Li(s) + ½N2(g) → Li3N(s)
STEP THREE: Reaction between lithium nitride and water to obtain LiOH and ammonia:
Li3N(s) + 3H2O → 3LiOH(l) + NH3(g)
The LiOH obtained in step 3 can be recycled and used again in step 1.
1. A. Write the two half-cells of the reaction in step 1 and indicate which half of the oxidation cell is
And who is half a courtship cell.
1.B. Here is a table with
| O2 | H20 | Li | LiOH | |
| +15.8 | -268 | +15.0 | -446 | ΔHf° (kJ/mol) |
| +236 | +224 | +63.7 | +128 | S° (J/K•mol) |
Calculate for step 1 performed at 750K the ΔG. SHOW CALCULATIONS.
2. An electrolysis process will take place when the voltage supplied is 0.6 V greater than the radar Of the cell. Calculate the minimum voltage that must be provided to perform the process in step 1.
3. In a particular experiment whose utilization was 5.88% the researchers provided a current of 0.200A
For 1000 seconds for lithium extraction (step 1). Assume that the survivors of steps 2 and 3
Be 100% and calculate:
A. The mass of lithium obtained in step 1.
B. the volume of the ammonia, NH3(g), that is recived in step three in 25C, 1atm.
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