Thermal energy transfer INSTRUCTED BY MS. SORN

6 DO NOW: THERMAL ENERGY TRANSFER 1/9/17 QUESTION: What is the difference between an exothermic reaction and an endothermic reaction? ANSWER: A chemical reaction that releases energy is called an exothermic reaction. A chemical reaction that stores energy is called an endothermic reaction.

READING SCIENCE “HEAT TRANSFER AND YOUR ELECTRICAL BILL” DO PAGES 4-6. HOMEWORK 1/9/17 READING SCIENCE “HEAT TRANSFER AND YOUR ELECTRICAL BILL” DO PAGES 4-6. Key Vocab 01: Words 1, 2

KEY VOCAB 01: WORDS 1 AND 2 1. Heat (noun) - Thermal energy that is being transferred from one place to another.  2. Energy (noun)- Exists in a variety of forms, such as electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to another. It is measured by the amount of work done, usually in joules or watts.

LEARNING TARGET

AGENDA Do now 1 Do now II (homework in planner) Key Vocab 01 / Words 1, 2 Recap of Homework Lesson Activity Video Exit Ticket: Comprehension Check

OBJECTIVES Be able to define and thoroughly explain the law of conservation of energy in terms of how energy changes form.

Heat is different than thermal energy.  Heat is thermal energy that is being transferred from one place to another. An object’s thermal energy equals the total energy of all its moving particles. Heat transfer happens when some of this energy moves from one object to another object.

Energy is never created and never destroyed; it simply changes form.

Energy clip: https://www.youtube.com/watch?v=0ASLLiuejAo

Energy clip: https://www.youtube.com/watch?v=DVSYA1RnSMQ

EXOTHERMIC REACTIONS

ENDOTHERMIC REACTIONS

RULE ABOUT HEAT FLOW When objects of different temperatures are in contact, heat always moves from the warmer to the cooler object until their temperatures are equal.

SPECIFIC HEAT Specific heat is the amount of heat needed to raise the temperature of a mass by one degree. The specific heat of a substance is a physical property dependent upon the molecular structure and phase of the substance.  Water has a very high heat capacity. Because water has such a high heat capacity, it can absorb and hold a lot of energy in the form of heat. This is also why water takes so long to get hotter (raise its temperature) or colder (lower its temperature).