Mini-test State the unit for power Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Mini-test State the unit for power Give the equation which links height above the surface, gravitational field strength, gravitational potential energy and mass State the unit for elastic potential energy Give the equation which links work done, distance and force applied State the unit for work done Give the equation for determining efficiency. State 3 energy stores State the unit for kinetic energy Give the equation for determining kinetic energy.

Learning Objectives By the end of this lesson you should be able to… Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact.

Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Thermal Energy “Thermal energy”, measured in joules, refers to the internal energy an object has due to its temperature. Temperature is a measure of the mean kinetic energy of the particles and therefore thermal is effect a form of kinetic energy. temperature change Energy change specific heat capacity = mass x

Specific Heat Capacity Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Specific Heat Capacity The specific heat capacity of a material is the amount of energy required to raise 1 kg of the material by 1 °C. temperature change energy specific heat capacity = mass x Energy is measured in joules (J). Mass is measured in kilograms (kg). Temperature change is measured in °C. Specific heat capacity is measured in J/kg°C.

Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Using the specific heat capacity of water (4200 J/kg°C), how much energy is needed to increase the temperature of 600 g of water by 80°C in a kettle? Specific heat capacity temperature change energy = x x mass energy = 0.6 x 4200 x 80 = 201 600 J

Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. A domestic hot water tank contains 200 kg of water at 20° C. How much energy must be supplied to heat this water to 70° C?( specific heat capacity of water = 4200 J/kg°C) temperature change energy specific heat capacity = mass x = 200Kg x 4200 J/kg°C x 50° C = 42,000,000J =42 x 106J =42MJ

Specific Heat Capacity Experiments Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Specific Heat Capacity Experiments Previously you have completed an experiment to determine the specific heat capacity of a metal using its increase in temperature.

Specific Heat Capacity Experiments Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Specific Heat Capacity Experiments By measuring the temperature change of water before and after the addition of a hot metal cube you are first going to determine the change in thermal energy of water. Using this value for energy gained we are going calculate the energy lost by the cube. Finally the energy lost by the cube can be used to calculate its specific heat capacity.

Specific Heat Capacity Experiments Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Specific Heat Capacity Experiments Follow the instructions on the sheet, record your observations carefully. You should do the maths in your book. Answer the questions in your book

Errors and Uncertainties Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Errors and Uncertainties Accuracy - describes how closely a measurement comes to the true value of a physical quantity Reproducibility - The extent to which a measurement replicated under the same conditions gives a consistent result.

Errors and Uncertainties Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Demonstrate that the law of conservation of energy can be applied to the heating and cooling of two objects in contact. Errors and Uncertainties

Learning Objectives By the end of this lesson you should... Recall and use the equation for calculating the energy transferred when a temperature change occurs. Explain the errors and uncertainties in a specific heat capacity experiment. Determine the specific heat capacity of a metal using its heating effect on water. H.Wk Create a required practical revision sheet, you have been provided with a template.