Fuel Cell Pre-Lab

Fuel Cell Pre-Lab - 100 10 cm 3 10.8 J/cm 3 Energy = 23 J...

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J. Sutherland 1 19 October 2006 Enge 1024– Fuel Cell Pre-Lab Sutherland, James Christopher 1. Given: Current I, 0.012 A Voltage V, 0.82 V Find: (a.)Resistance R, Ω (b.)Power P, W Relationships: V = IR P=VI Solution: (a.)0.82 V = 0.012 A * R R = 68 Ω (b.)P = 0.012 A * 0.82 V P = 0.0098 W 2. Given: Find: Faraday Efficiency Relationships: ___________________________________________________________________ Solutions: Total Hydrogen Volume Consumed (cm 3 ) Total Time (s) Avg. Current (A) Avg. Voltage (V) 10 311 0.124 0.65 (a.) η Energy = 0.65 V * 311 s * 0.124 A
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Unformatted text preview: * 100% 10. cm 3 * 10.8 J/cm 3 η Energy = 23% J. Sutherland 2 (b.) V H 2 = 0.124 A * 311 s * 24000 cm 3 /mol 2 * 96484 ºC/mol V H 2 = 4.8 cm 3 η Faraday = 4.8 cm 3 * 100% 5.0 cm 3 η Faraday = 96% 3. (a.) No, the propeller shouldn’t immediately stop since there will be a small amount of energy left in the cell once the hydrogen supply has been cut off to power the propeller momentarily. (b.) The propeller would perform at a faster rate since the motor is receiving more energy....
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Fuel Cell Pre-Lab - 100 10 cm 3 10.8 J/cm 3 Energy = 23 J...

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