Calorific Content of Fuels

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Presentation transcript:

Calorific Content of Fuels 22/09/2018 Calorific Content of Fuels Unit 1 Fundamentals of Science 1.3 Energy For all

Calorific Content of Fuels 22/09/2018 Calorific Content of Fuels P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Lab report Introduction Variables Equipment Method Risk Assessment Table of Results Graph (Bar Chart) Conclusion P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Bond Energy When chemical bonds are made energy is released When chemical bonds are broken energy is taken in P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Bond Energies P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Bond Energies

Burning Ethanol Ethanol + Oxygen  Carbon Dioxide + Water C2H5OH + O2  CO2 + H2O P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Burning Ethanol C2H5OH + 3O2  2CO2 + 3H2O What is the energy require to break all bonds in the reactants What is the energy release to make all bonds in the products? How does this compare to the true value P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Burning Ethanol 1 mole of Ethanol 12+12+6+16 = 46 g Theoretical energy per mole? Theoretical energy per gram? P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy

Energy required to heat water Change in Energy = Mass x Change in temperature x Specific heat capacity of water SHC of water is 4200 J/Kg/OC If 10 ml (1g = 1ml) of water heats up by 2OC that requires 0.01 x 2 x 4200 = P6 Describe different types of energy transfer P7 Carry out a practical investigation into the calorific value of different fuels M3 carry out a practical demonstration of a range of energy interconversions with appropriate explanations of the systems investigated D3 Evaluate the efficiencies of energy conversion systems Keywords – Gravitational Potential Energy, Kinetic Energy