A methane fuel cell is based on CH4(g) + 2O2(g) - CO2(g) + 2H2O(l) with Delta_r G deg = -818 kJ mol^-1 and Delta_r H de

Question

A methane fuel cell is based on CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) with Delta_r G deg = -818 kJ mol^-1 and Delta_r H deg = -890 kJ mol^-1 at 298 K. Take F = 96500 C mol^-1. Which statements are correct?

Accepted Answer

Eight moles of electrons are transferred per mole of methane

Accepted Answer

The standard EMF of the cell is about 1.06 V

Accepted Answer

The maximum thermodynamic efficiency Delta_r G deg/Delta_r H deg is about 92%

Answer

Operating at a steady current of 1.00 A, the cell consumes one mole of methane in about 26.8 h

A methane fuel cell is based on $CH X_{4} (g) + 2 O X_{2} (g) CO X_{2} (g) + 2 H X_{2} O (l)$ with $Δ_{r} G^{\circ} = - 818 kJ mo l^{- 1}$ and $Δ_{r} H^{\circ} = - 890 kJ mo l^{- 1}$ at 298 K. Take $F = 96500 C mo l^{- 1}$ . Which statements are correct?

Answer: B, C, D

More questions on Fuel cells

A methane fuel cell is based on CHX4​(g)+2OX2​(g)​COX2​(g)+2HX2​O(l) with Δr​G∘=−818 kJmol−1 and Δr​H∘=−890 kJmol−1 at 298 K. Take F=96500 Cmol−1. Which statements are correct?

Answer: B, C, D

More questions on Fuel cells

A methane fuel cell is based on $CH X_{4} (g) + 2 O X_{2} (g) CO X_{2} (g) + 2 H X_{2} O (l)$ with $Δ_{r} G^{\circ} = - 818 kJ mo l^{- 1}$ and $Δ_{r} H^{\circ} = - 890 kJ mo l^{- 1}$ at 298 K. Take $F = 96500 C mo l^{- 1}$ . Which statements are correct?