Fuel Cell

aCtivity 4 Modeling the Fuel Cell chemical reaction u C h al l en ge how do the redox reactions in a give the axe cadre generate electrical vigour? In the preceding(prenominal) activity, Mariyah cut burn down cells in action. Now its value for her to learn the details about how they work. In the preceding activity, you use up a proton exchange membrane (PEM) fire cell. This type of supply cell is already in use in buses, cars, and pronouncement generators, and may be widely used in the future. relate a battery, a fuel cell converts chemical cleverness into electricity. hostile a battery, a heat content 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 render electricity through with(predicate) chemical reactions that involve the transfer of electrons. Chemists label 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 try for electrons are called reduction reactions. Inside a PEM hydrogen fuel cell, electric original is generated using the two chemical half-reactions shown below.

oxidisation: H2 S 2H+ + 2eReduction: 4H+ + O2 + 4e- S 2H2O These equations can be added to obtain the effect equation. But rootage the oxidation reaction must be multiplied by two, so that the derive of electrons in the reactants balances with the number 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. each(prenominal) 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 away electrical circuit. In the previous activity, this circuit provided the business line that let the electric motor...If you want to get a teeming essay, order it on our website: BestEssayCheap.com

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