P1a Heating Houses

(Can-Do Task P1a Heating Houses Name: ENERGY FOR THE HOME Date: 3 points I can carry out an experiment to find out the energy needed to melt ice. Method Measure 100g of water and place in polystyrene cup. Record the initial temperature. Add 20g of ice. Monitor until all the ice has melted and record the lowest temperature as the final temperature initial temperature °C  final temperature - °C  temperature change = °C   energy = mass X specific heat capacity X temperature change     energy = 0.1kg X 4,200 X °C      energy = J   In my experiment it required J of energy to melt 20g of ice. To calculate the energy required to melt 20g of ice you use this formula: energy = mass X specific latent heat energy = 0.02kg X 330,000 energy = 6,600J The

(Homework (30mins approx P1a Heating Houses ENERGY FOR THE HOME Specific Heat Capacity and Specific Latent Heat How much energy is needed to heat 3kg of aluminium from 21°C to 50°C?(SHC aluminium 910J/kg/°C) (3 marks) How much energy is needed to melt a 1,000,000kg iceberg at 0°C?(SLH melting water 330,000J/kg) (3 marks) How much water can be turned to water vapour at 100°C using 50,000kJ?(SLH boiling water 2,260,000J/kg) (3 marks) What is the SHC of steel if it takes 525J to raise the temperature of 250g of steel by 5°C? (3 marks) If 3.5kg of lead cools by 6.5°C how much energy has it lost?(SHC lead 130J/kg/°C) (3 marks) Total 15 marks (Homework (30mins approx P1a Heating Houses ENERGY FOR THE HOME Specific Heat Capacity and Specific Latent Heat How much energy is needed to heat 3kg of aluminium from 21°C to 50°C?(SHC aluminium 910J/kg/°C) (

P1a Heating Houses10/05/2010James Ferguson Claydon High School1How much energy is needed to heat 3kg of aluminium from 21°C to 50°C?(SHC aluminium 910J/kg/°C) energy = mass X SHC X temp chenergy = 3 X 910 X 29energy = 79,170J or 79.17kJ 1 mark 1 mark 1 markTotal 3 marksP1a Heating Houses ENERGY FOR THE HOMEHomework 30mins approxSpecific Heat Capacity and Specific Latent Heat© 2006 James FergusonP1a Heating Houses10/05/2010James Ferguson Claydon High School2How much energy is needed to melt a 1,000,000kg iceberg at 0°C?(SLH melting water 330,000J/kg) energy = mass X SLHenergy = 1,000,000 X 330,000energy = 330,000,000,000J or 330,000,000kJ or 330,000mJ 1 mark 1 mark 1 markTotal 3 marksP1a Heating Houses ENERGY FOR THE HOMEHomework 30mins approxSpecific Heat Capacity and Specific Latent Heat© 2006 James FergusonP1a Heating Houses10/05/2010James Ferguson Claydon High School3How much water can be turned to water vapour at 100°C using 50,000kJ?(SLH boiling water 2,260,000J/kg) mass = 22kg

P1a Heating Houses10 May 2010James Ferguson Claydon High School1Heating HousesMr J Ferguson Year 10 GCSE (Higher) OCR Gateway Science Suite ENERGY FOR THE HOME Lessons 1-2 (P1a)10 May 2010© 2006 James FergusonP1a Heating Houses10 May 2010James Ferguson Claydon High School2IndexHeat and Temperature Hot Cup of Coffee Gets Cooler Ice Drink Specific Heat Capacity Example SHC Question /SHC Questions Melting and Boiling Heating and Cooling Graphs Specific Latent Heat Example SLH Question /SLH QuestionsP1a Heating Houses10 May 2010James Ferguson Claydon High School3ObjectivesRecognise that energy flows from a hot body to a cool one. Describe temperature as a measurement of hotness on a chosen scale. Describe heat as a measurement of energy on an absolute scale. Understand and apply the equation for specific heat capacity and specific latent heat.P1a Heating Houses10 May 2010James Ferguson Claydon High School4Heat and TemperatureHeat is a measure of energy When a substance is heated it gains energy. When a substance is cooled it loses energy. Energy is measured in Joules (J). It cannot be negative!