Thermodynamics Project Tuesday, February 2, 2016

Tuesday, 2/2  Take out your practice problems from Thursday.  Take out your notes from Thursday.  Respond to the following on your warm-up:  Describe the methods of heat transfer.  What role does building insulation play in the transfer of thermal energy? Upcoming dates:  Thursday, 2/4 – Thermodynamics quiz  Thursday, 2/4 – Thermodynamics project due  Monday, 2/8 – Thermodynamics test and missing work deadline  Wednesday, 2/17 – Electricity quiz  Thursday, 2/25 – Electricity quiz  Monday, 2/29 – Electricity Test and missing work deadline  Friday, 3/4 – Magnetism quiz  Friday, 3/4 – 3NWS Extra credit due by 4:00 PM  Thursday, 3/10 – Magnetism test  Friday, 3/11 – End of the 3NWS

What is specific heat?  Every substance gains or loses heat based on its identity/physical property.  The physical property of a substance is its specific heat capacity.

Examples of specific heat

What is specific heat capacity?  Is the amount of heat (thermal energy) required to raise a unit of mass of the substance by one degree of temperature (liquids and solids).  Measure of how much thermal energy is required to change the temperature of a substance.

What is the equation for calculating heat change

How do you determine if heat is gained or lost  If heat energy is gained Q is positive.  If heat energy is lost Q is negative.

Example problem

Practice Problems

Project Background There are many ways in which society can reduce energy costs (you read about some of them after the mechanical energy test). This project will focus on the methods of heat transfer to reduce household energy costs. We have discussed how thermal energy flows (high temperature to lower temperature) the concept of thermal equilibrium, and the methods of heat transfer. Use your knowledge of heat transfer to make recommendations, to reduce energy costs, to someone you know who owns a home. You can also make recommendations to the future version of yourself when you own your own home.

Project Groups You will work in groups of three for this project.

Project Grading You will create a presentation and share it with your teacher via Google Drive. You will present your project to the class. The presentation will include the following: 1. What types of heat transfer need to be considered when making recommendations to a homeowner about reducing their energy costs? 2. What household updates do you recommend the homeowner make to reduce energy costs? 3. What is ‘R’ value and what does a homeowner need to take into consideration when choosing insulation? 4. What is the cost savings for your recommendation? Make sure you take into consideration the cost of installing insulation. 5. List of resources used.

Project Project suggestions  Choose one home to focus on (one you, or a group member, currently live in or will live in in the future) for your group.  Presentation should take about two minutes to deliver.  Don’t be limited to the resources on your teacher’s website.

Timeline  Projects are due (meaning shared with me via Google Drive) ten minutes after the late bell rings on Thursday, 2/4.  Presentations will begin on Thursday, 2/4. If we run out of time on Thursday we will finish presentations on Monday, 2/8.