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← ScienceWhich outcome occurs when fuel cell temperature decreases?
A)Electrolyte membrane proton conductivity decreases✓
B)Reaction equilibrium shifts favorably right
C)Product water evaporation rate increases
D)Catalyst surface area becomes available
💡 Explanation
The proton conductivity drops due to decreased thermal energy affecting *ionic mobility*; therefore, ion transport slows down rather than speeding up reaction kinetics, because increased temperature drives membrane dehydration.
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