PPT-Lesson 4 : Heat Energy Thinking about Heat, Energy, and Temperature: An Introduction

Discovery Education Video This clip introduces heat energy and temperature Some key terms and concepts are introduced Heat is a form of energy that we can feel What is heat What is heat. Thermochemistry. Energy absorbed or released as heat in a chemical or physical change is measured in a . calorimeter. .. In some calorimeters, known quantities of reactants are submersed in water and combusted. The energy given off is noted by the temperature change in water.. Heat Energy. Heat energy is due to the movement of atoms or molecules.. As atoms move faster they create more energy = causing Heat!. Thermal Energy. Depends upon the mass, temperature and phase of an object.. Introduction to Heat. Heat is a form of energy.. A large amount of energy ends up as heat.. Example: in a car some of the chemical energy stored in petrol is turned into heat energy. . Heat can have a significant effect on solids, liquids and gases (such as expansion).. Topic 5.1. THERMOCHEMISTRY. The study of heat released or required by chemical reactions. Fuel is burnt to produce energy - combustion. CH. 4(g). 2O. 2(g). CO. 2(g) . 2H. 2. How do we measure Temperature?. Thermal expansion . – The fluid in a thermometer’s bulb heats up and expands, increasing the volume until it flows up the tube of the thermometer.. Color change. – Some materials change color based on their temperature. Examples are forehead thermometers and mood rings.. Thermochemistry. Energy absorbed or released as heat in a chemical or physical change is measured in a . calorimeter. .. In some calorimeters, known quantities of reactants are submersed in water and combusted. The energy given off is noted by the temperature change in water.. Heat. The transfer of thermal energy . Not a measure of energy but rather of energy transferred. . Measured in terms of joules or calories (cal). . Calories relate heat to changes in temperature. . Calorie is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius. . And Heat . Is Transferred. EQ: How can heat be transferred from one place to another?. Temperature. The weather report says that today’s high temperature will be 48 degrees and it will be cloudy. What should you wear?. Section 16.1 – Thermal Energy and Matter. In the 1700’s most . scientists. thought that . heat. was a . fluid. called . caloric. that flowed between objects.. Count Rumford. Rumford. studied the process of . Chapter. 18. Copyright © 2014 John Wiley & Sons, Inc. All rights reserved.. 18-. 1. . Temperature. 18.01 . Identify the lowest temperature as 0 on the Kelvin scale (absolute zero).. 18.02 . Explain the . HEAT ENERGY TRANSFER AND AIR TEMPERATURE As we have seen, Earth’s Weather and Climate are the results of the intricate interrelationships between the Earth and the Sun, and between the components of our Atmosphere and Work = force x distance. The ability to do . work.. Work - . cause a change or move an object.. Many types- all can be changed into the other.. Energy. Potential. - stored energy. Position, condition or composition. Flows from higher-temperature object to lower-temperature object. System. (T. 1. ). Surroundings. (T. 2. ). Heat. If T. 1. > T. 2. q . system. = -. exothermic. System. (T. 1. ). Surroundings. (T. Clausius. – . Clapeyron. equation, Temperature dependence of entropy, Statistical interpretation of entropy, Consequences of third law, Nernst heat theorem, Equilibrium constant, Van-Hoff equation, Concept of fugacity, activity and mole fraction.