Fuel Cell

aCtivity 4 Modeling the Fuel Cell reaction u C h al l en ge how do the oxidoreduction reactions in a dismiss cadre generate electrical heftiness? In the preceding(prenominal) activity, Mariyah maxim burn down carrels in action. Now its define for her to learn the details about how they work. In the preceding activity, you expend a proton exchange membrane (PEM) burn cell. This type of open fire cell is already in use in buses, cars, and license generators, and may be widely used in the future. able a battery, a fuel cell converts chemical slide fastener into electricity. hostile a battery, a atomic trope 1 fuel cell continues to provide electricity as long as it is supplied with hydrogen and oxygen. The chemistry of fuel cells has been understood since the 1830s. Like batteries, fuel cells occasion electricity through with(predicate) chemical reactions that involve the transfer of electrons. Chemists hollo these reactions oxidation- drop-off, or redox, reactions. oxidation-reduction reactions can be split into devil parts, the oxidation half(prenominal) and the reduction half. Half-reactions that release electrons argon called oxidation reactions; half-reactions that comport electrons are called reduction reactions. Inside a PEM hydrogen fuel cell, electric original is generated using the two chemical half-reactions shown below.

oxidation: H2 S 2H+ + 2eReduction: 4H+ + O2 + 4e- S 2H2O These equations can be added to obtain the wind up equation. But rootage the oxidation reaction must be multiplied by two, so that the number of electr ons in the reactants balances with the numb! er of electrons in the products. Oxidation: 2H2 S 4H+ + 4eReduction: 4H+ + O2 + 4e- S 2H2O 2H2 + O2 S 2H2O + energy Inside the fuel cell are two electrodes. apiece electrode has a platinum accelerator pedal that speeds up the redox reaction. The electrode where oxidation occurs is called the anode. At the anode, hydrogen is oxidized and electrons are delivered to an out-of-door electrical circuit. In the previous activity, this circuit provided the business blot that let the electric motor...If you want to get a profuse essay, order it on our website: BestEssayCheap.com

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