Energy changes in chemistry Exothermic and endothermic reactions, including reaction profiles distinguish between endothermic and exothermic reactions on the basis of the temperature change of the surroundings draw and label a reaction profile for an exothermic and an endothermic reaction, identifying activation energy explain activation energy as the energy needed for a reaction to occur calculate energy changes in a chemical reaction by considering bond making and bond breaking energies. Carbon compounds both as fuels and feedstock recall that crude oil is a main source of hydrocarbons and is a feedstock for the petrochemical industry explain how modern life is crucially dependent upon hydrocarbons and recognise that crude oil is a finite resource. Chemical cells and fuel cells recall that a chemical cell produces a potential difference until the reactants are used up evaluate the advantages and disadvantages of hydrogen/oxygen and other fuel cells for given uses. Uses of mathematics arithmetic computation when calculating energy changes (1a) interpretation of charts and graphs when dealing with reaction profiles (4a). The rate and extent of chemical change Factors that influence the rate of reaction, including catalysts suggest practical methods for determining the rate of a given reaction interpret rate of reaction graphs describe the effect of changes in temperature, concentration, pressure, and surface area on rate of reaction explain the effects on rates of reaction of changes in temperature, concentration and pressure in terms of frequency and energy of collision between particles
Energy changes in chemistry Exothermic and endothermic reactions, including reaction profiles distinguish between endothermic and exothermic reactions on the basis of the temperature change of the surroundings draw and label a reaction profile for an exothermic and an endothermic reaction, identifying activation energy explain activation energy as the energy needed for a reaction to occur calculate energy changes in a chemical reaction by considering bond making and bond breaking energies. Carbon compounds both as fuels and feedstock recall that crude oil is a main source of hydrocarbons and is a feedstock for the petrochemical industry explain how modern life is crucially dependent upon hydrocarbons and recognise that crude oil is a finite resource. Chemical cells and fuel cells recall that a chemical cell produces a potential difference until the reactants are used up evaluate the advantages and disadvantages of hydrogen/oxygen and other fuel cells for given uses. Uses of mathematics arithmetic computation when calculating energy changes (1a) interpretation of charts and graphs when dealing with reaction profiles (4a). The rate and extent of chemical change Factors that influence the rate of reaction, including catalysts suggest practical methods for determining the rate of a given reaction interpret rate of reaction graphs describe the effect of changes in temperature, concentration, pressure, and surface area on rate of reaction explain the effects on rates of reaction of changes in temperature, concentration and pressure in terms of frequency and energy of collision between particles
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