10.02.8 KEYWORDS

· Energy Conservation –No energy is made or destroyed in a reaction

· Exothermic – A reaction that releases energy, making us feel hot

· Endothermic – A reaction that absorbs energy, making us feel cold

· Combustion – burning

· Thermal decomposition – breaking up a substance by heating (not same as burning)

· Oxidation – reaction that adds Oxygen (includes burning & rusting) or removes electrons

· Reactants – substances that react in a reaction

· Products – substances produced in a reaction

· Reaction Profile – graph displaying energy of reactants & products at different heights

· Sufficient - enough

· Activation Energy – the minimum energy that reactants must collide with to cause a reaction

· Bond energy – energy needed to break a bond (energy released when bond forms)

· Cell – device containing chemicals that releases energy as electricity

· Battery - two or more cells joined together

· Electrode – the conducting metal in a cell

· Electrolyte – the reacting substance inside the cell.

· Rechargeable – cell in which chemical reaction can be reversed by attaching to the mains

· Fuel Cell – cell which allows fuel to be constantly added instead of stored

· Potential Difference – Physics for voltage