a-recently-developed-fuel-cell-is-the-molten-carbonate-fuel-cell-where-the-elect

Question

Molten carbonate fuel cells (MCFC) are newly developed fuel cells that commonly use molten lithium and potassium carbonates as electrolytes. The half-reactions in the cell are shown below:
Anode: H₂(g) + CO₃^2–(l) → H₂O(l) + CO₂(g) + 2 e^–
Cathode: 1/2 O₂(g) + CO₂(g) + 2 e^– → CO₃^2–(l)
(a) What is the mass of hydrogen gas (in grams) needed to generate a constant current of 12.4 A for 10.0 h?
(b) What is the volume (in liters) of the hydrogen gas if the required conditions are 650°C and 1406 mmHg?

Accepted Answer

(a) mass H_{2} = 4.66 g; (b) V = 94.7 L

Answer

(a) mass H_{2} = 4.66 g; (b) V = 66.7 L

Answer

(a) mass H_{2} = 9.33 g; (b) V = 66.7 L

Answer

(a) mass H_{2} = 9.33 g; (b) V = 94.7 L