Fuel cells do not need to be periodically recharged like batteries, but instead continue to produce electricity as long as a fuel source is provided. Gcse science chemistry 91 triple fuel cells youtube. Oct 19, 2017 a lesson double covering all content for gcse combinedchemistry for cells, batteries and fuel cells 3 exam questions to use as assessment, some recommended as part of the lesson plan, others for extension. These have been around for a long time as a portable source of energy.
A fuel cell is composed of an anode, a cathode, and an electrolyte membrane. In addition to the strengths in the table above, the water they produce is useful as drinking water for astronauts. Fuel cells aqa gcse chemistry revision notes save my exams. The phosphoric acid fuel cell operates at a temperature in between, at 200 c.
Batteries and fuel cells triple only gcse chemistry 9. Doc browns chemistry ks4 sciencechemistry gcseigcseo levela level revision. It has been designed specifically for children and students. This video covers the content needed for the fuel cells module on gcse chemistry. This list contains resources for teaching about electrolysis and fuels cells at ks4. Choose from 500 different sets of gcse chemistry fuels flashcards on quizlet. Gcse science chemistry 91 oxidation and reduction in terms of electrons duration. An introduction to the concept of nuclear fusion and details of current scientific research.
These power an electric motor, which turns the wheels. Fuel cells overview the chemistry of fuel cells can be related to many areas of the gce chemistry specification, including sections 2. Can someone explain how a fuel cell works and a way of remembering the equations please. The table of contents has been structured around the aqa specification. Designed by expert teachers for the edexcel gcse 91 chemistry syllabus. Doc browns chemistry ks4 sciencechemistry gcseigcsea level revision. Batteries and fuel cells triple only gcse chemistry 91 mr gs science tutorials. Free practice questions for ap environmental science hydrogen and fuel cells. Lt fuel cells work in a range from room temperature to approx. Chemical cells edexcel gcse chemistry revision notes. In addition, solid electrolyte systems obviate the need to contain corrosive liquids and, thus, solid oxide and polymer electrolyte fuel cells are preferred by many developers over alkali, phosphoric acid, or molten carbonate fuel cells. This could be a problem once a spacecraft leaves the earth. Pros and cons of hydrogen fuel cells uses for cells chemical cells are used a lot in everyday life.
Learn about the production of voltage using chemical cells with gcse bitesize chemistry aqa. Electrochemical cells a2 aqa chemistry unit 5 fuel cells confusion methanol oxygen and ethanol oxygen fuel cells energy storage cells chemistry triples do we need to know about alkaline fuel cells for gcse 91 chemsitry hydrogen fuel cells help a2 ocr easy way to remember what happens in a fuel cell. Edexcel international gcse chemistry 4ch1 for exams from 2019. The table shows some strengths and weaknesses of each type of vehicle. Designed for teaching gcse chemistry specification parts aqa 4. An introduction to nuclear fusion gcse physics single. These cells are becoming more common in the automotive industry to replace petrol or diesel engines. Learn about chemical cells and fuel cells with bitesize gcse chemistry ocr gateway. Hydrogen fuel cells gcse physics single science bbc. It covers the major topics for the aqa, edexcel and ocr exams with a range of exercises that test what you know and how well you can apply your knowledge. Even if you dont want to study science or maths further, the grades. An introduction to fuel cells gcse chemistry youtube. Practical 18 measuring the emf of an electrochemical cell required practical 8 click here to view some great books which can aid your learning. Sep 02, 2019 91 chemistry is a textbook designed to act as a free, reliable guide for students attempting the 91 chemistry gcse.
Other vehicles use engines fuelled by petrol or diesel. Comparing cells gcse chemistry single science revision bbc. Gcse science chemistry 91 crude oil and hydrocarbons. Fuel cells are subdivided in low temperature lt and high temperature ht fuel cells. A substance is a good fuel if it is easily available, releases a large. A chemical cell produces a voltage until one of the reactants is used up. Gcse chemistry revision worksheets energy transfers. A fuel cell works by passing hydrogen through the anode of a fuel cell and oxygen through the cathode. Electrochemistry revision notes on electrolysis, cells, experimental methods, apparatus, batteries, fuel cells and industrial applications of electrolysis. Hydrogen fuel cells can be found in many different places today. Currently, fuel cells are much more expensive than rechargeable batteries, due to the high prices of its individual parts, such as the platinum catalysts. Written by the expert teachers at save my exams for the aqa 91 gcse chemistry exam. A fuel will burn more rapidly and release energy at a faster rate if it is supplied with pure oxygen instead of air.
Chemistry triples do we need to know about alkaline fuel. Compare this to a fossil fuel fired power plant, which is typically 35% efficient, and the internal combustion engine in most vehicles, which operates at about 15% to 20% efficiency. A fuel cell is an electrochemical cell that converts the chemical energy of a fuel often hydrogen and an oxidizing agent often oxygen into electricity through a pair of redox reactions. I have my gcse aqa chemistry exam tomorrow triple and im currently looking at fuel cells. Energy is released as electrical energy, not thermal energy heat.
The section of the syllabus on electrolysis and fuel cells. Part of the energy changes topic for aqa chemistry and trilogy. When the fuel being used is hydrogen the fuel cell produces electricity plus water. Nov 12, 2017 gcse science chemistry 9 1 crude oil and hydrocarbons.
It looks at the work of the joint european torus jet project near oxford in the uk. The electrolyte in an alkali fuel cell is potassium hydroxide koh. In this section, we describe the chemistry behind some of the more common types of batteries and fuel cells. Apr 15, 2015 i want to help you achieve the grades you and i know you are capable of. Fuel cells aqa gcse chemistry single science revision aqa.
Fuel cells are different from most batteries in requiring a continuous source of fuel and oxygen usually from air to sustain the chemical reaction. Fuel cells can operate at higher efficiencies than combustion engines, and can convert the chemical energy in the fuel to electrical energy with efficiencies of up to 60%. Fuel cells for education the university of tennessee at. Nevertheless, each of the fuel cell types listed in table 1 has been demonstrated in complete fuel cell. Gcse chemistry revision worksheets chemistry past papers.
Hydrogenoxygen fuel cells must be supplied with hydrogen fuel and oxygen. Namely, hydrogen electrons split from their protons to. In a hydrogenoxygen fuel cell, hydrogen and oxygen are used to produce a voltage, and water is the only product. Chemistry triples do we need to know about alkaline fuel cells for gcse 91 watch announcements find your gcse study and revision group here and get ahead on your revision. Evaluating different cells chemical cells aqa gcse.
However, formatting rules can vary widely between applications and fields of interest or study. Fuel cells gcse chemistry new spec teaching resources. Energy transfers and fuel cells are now a bigger part of the gcse chemistry course. Individual fuel cells produce relatively small electrical potentials, about 0. A hydrogen fuel cell is made from an anode and a cathode with an electrolyte contained between them. Chemistry revision notes on the topic chemical cells. An introduction to nuclear fusion gcse chemistry single. This book is packed with practice questions for gcse chemistry students. Fuel cells are able to generate a large amount of electrical energy, much greater than that produced by rechargeable batteries. Start studying gcse chemistry energy changes in chemical reactions. An electrochemical cell is a device capable of either generating electrical energy from chemical reactions or using electrical energy to cause chemical reactions.
Fuel cells work in a different way than chemical cells. It is not the same as an electrolysis cell which needs to be supplied with electricity. Fuel cells and rechargeable batteries level 8 chemistry. Evaluating fuel cells chemical cells and fuel cells. A large number of fuel cells must be wired together to. Aqa gcse sciences student book answers separate sciences. Part of the lesson pack published on the tes website for. Aqa gcse sciences student book answers separate sciences download answers to the practice and summary questions in your aqa gcse sciences 91 biology, chemistry and physics student books. This pack contains all of the resources for a lesson on this topic. Fuel cells alevel chemistry ocr, aqa, edexcel youtube. You still need to know about endothermic and exothermic reactions along with energy level diagrams but now you also have to learn about fuel cells and how they store energy. The book s saying that the anode is the negative electrode and the cathode is the positive electrode.
Learn gcse chemistry fuels with free interactive flashcards. In contrast, a fuel cell is a galvanic cell that requires a constant external supply of one or more reactants to generate electricity. The fuel is oxidised electrochemically, rather than being burned, so the reaction takes place at a lower temperature than if it was to be burned. The answers are in the back of the book so you can easily check your work and find out where youre going wrong. This document has been compiled with input from our members to answer some of the most commonly asked questions around hydrogen and fuel cells.
Designed for teaching gcse chemistry specification parts aq. Introduction to simple cells and batteries how do they work. Students could be asked to explain in their own words how hydrogen fuel cells work and what the advantages are. Part of the lesson pack published on the tes website for specification parts aqa 4. The electrochemical cells which generate an electric current are called voltaic cells or galvanic cells and those that generate chemical reactions, via electrolysis for example, are called electrolytic cells. The hydrogen hub have used their knowledge to develop this fantastic lesson pack on fuel cells. Fuel cells have several benefits over conventional combustionbased technologies currently used in many power plants and passenger vehicles. Cells, batteries and fuel cells whole lesson plus example. Gcse chemistry energetics high demand questions questionsheet 2 fuel cells are often taken into space to supply energy. Part of the lesson pack published on the tes website for specification parts. Separate chemistry 1 transition metals, quantitative analysis, dynamic equilibria, chemical cells and fuel cells separate chemistry 2 qualitative analysis, hydrocarbons, polymers, alcohols and carboxylic acids, bulk and surface properties of matter including nanoparticles chemistry gcse only. The cell can be used with a range of fuels, such as methanol or ethanol.
Fuel cells are classified by the electrolyte they use, which is the main difference among the various types of fuel cells. The original batteries were zinccopper voltaic cells and as technology progressed they moved to zinc manganese dioxide so called dry cells and nowadays there are a whole range of different cells including rechargeable nickel and tiny lithium ion cells. Some cars and buses contain hydrogenoxygen fuel cells. They turn the energy of a fuel directly into electricity. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Gcse chemistry energy changes in chemical reactions. Currently, fuel cells are far larger than rechargeable batteries. References within this document relate to the gce chemistry specification. In a hydrogenoxygen fuel cell, hydrogen and oxygen are used to produce a voltage, and water is the only. Is this a mistake or are the charges different when it comes to fuel cells. Fuel cells chemical cells aqa gcse chemistry single.
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