Chemical engineering
1. We need extra chemical energy from hydrogen than 5 kW as fuel cell is not 100% efficient. Excess is converted to heat.
2. Power Needed = 5000 W / 0.569 = 8785.7 W from H2
3. 8785.7 W = 8785.7 J/s. Divide this by the energy produced from reacting 1 mol of hydrogen. 8785.7 J/s * (1 mol H2 / 241,830 J) = 0.0363 mol/s of hydrogen
a. What flow rate of water is produced by this fuel cell? Will it be able to sustain the 5 astronauts who use 11 liters each day?
