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# Thermal Energy And You

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### Thermal Energy And You

1. 1. Thermal Energy and You By Ciara Eldridge Block 4
2. 2. What it Thermal Energy? • The dictionary definition of Thermal Energy would be considered “Total Kinetic Energy of the System.”
3. 3. Wait?! What’s Kinetic Energy? • Kinetic energy is the energy of motion. How much you have depends on the mass and speed of a substance. Thermal Energy refers to the Kinetic Energy of the microscopic particles(molecules). The Higher the temperature the faster the particles.
4. 4. You mentioned temperature, like how hot something is, right….? • Not exactly. Temperature is basically the average kinetic energy a substance obtains. • No, this is not considered “how hot.” Heat is in this context a verb and is the act of transferring Thermal Energy.
5. 5. Are there different types of heat transfer?? • Yes only 3, Conduction, Convection, and Radiation.
6. 6. Conduction?? • This is the transfer of thermal Energy by direct contact. ( or the transfer of energy through matter from particle to particle). • Examples: Touching a stove and being burned • -Ice cooling down your hand • -Boiling water by thrusting a red • -hot piece of iron into it • Hugging another and getting heated and hot after a while.
7. 7. Convection?? • Convection is the transfer of thermal energy from the movement of molecules. • Examples: Warm, rising air (thermals) due to heat rising from the earth. As the warm air rises, cool air comes in from the sides to take its place. This sets up a circulating flow of air. Also, watch a glass beaker of boiling water over a not-too-high Bunsen flame, or see a pan on the stove. Note the water is rising and falling in a circular manner.
8. 8. Radiation?? • Radiation is the transfer of heat from waves(Electromagnetic ). • Examples: A microwave. It sends out microwaves which radiate the water molecules in the object in the microwave and excite them and that's why the object will get hot. • visible light • infrared or ultraviolet
9. 9. So…How Do I Know How Much Thermal Energy I Have? • There is the total thermal energy equation of course. • (Tf-Ti)t . (mass)(Cp) • Tf-Ti (Temp. Final – Temp. Initial)is the change in temperature in your data • T is temperature • Cp is the Specific heat Capacity • “.” Is multiply
10. 10. The Process of Losing and Gaining • There are two changes to thermal energy: Endothermic change and an Exothermic change.
11. 11. Endothermic Change • This is a change in which energy is aborbed. • The substance takes in energy and the molecules move faster as result. • Examples: Ice cream gains energy and therefore thermal energy and proceeds to melt.
12. 12. Exothermic Change • This is a change in which energy is released. • The substance loses energy and the particles move slower as a result. • Example: The Atomic bomb explodes and releases energy.
13. 13. END! • YOU NOW KNOW ALL THE BASICS OF THERMAL ENERGY~~~~~~!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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