Energy class Assuming S0.08/kWh. what would it cost (for the energy alone) to us
ID: 974298 • Letter: E
Question
Energy class
Assuming S0.08/kWh. what would it cost (for the energy alone) to use electrolysis to generate 20 liters of H_2 at 700 atm. (Hb is also found in natural gas and might be cheaper.) For electrolysis one needs a voltage of about 1.5 V. The relevant equations are: 2CP rightarrow Cl_2 + 2e- 2H_20(e) + 2e- rightarrow H_2(g) + 20H- Use Faraday's law with n = 2 to determine the energy per mole. Determine the number of moles in the container (from Prob. 1) and finally the cost of the equivalent number of kWh.Explanation / Answer
considering electrolysis temperature as = 2273 k u have not mentioned the temperature above whatever it may be procedure is the same
no of moles of H2 to generate = 20*700/0.0821*2273 = 75.021
gibbs free energy = - 75.021 * 96500 * 1.5 = 10859 kj
cost of equivalent no of Kwh = 10859*0.8 $ = 8687.48 $ which is a whopping amount
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