Thermodynamics, Temperature, Temp conversions CH 15& 16 Be sure the volume is working on your computer or laptop View this as a slide show

Thermodynamics Thermodynamics – the study of conversions between thermal energy and other forms of energy. 1st Law of thermodynamics Energy is conserved in a system Click here to find out another way to define the first law of Thermodynamics 2nd law of thermodynamics Thermal energy always moves from a warmer place to a cooler place EX: hands around a mug of hot chocolate- the heat moves from hot chocolate to your hands It only happens in reverse if WORK is done on the object or system EX: air conditioner motor blows out cold air into heated room Click here and scroll down to “the rest of the story” and define second law of thermodynamics

What is Thermal Energy? Put on your headphones and click the link below to watch the short video clip over thermal energy. Be sure to follow along, there are questions on your assignment sheet to answer( 7-10). The video will stop( at about 3:00 minutes) Click here to watch- Thermal Energy Now, Click here to watch a small clip on Geothermal Energy. You’ll be able to answer questions 11-12 from this video clip. Now, click here to watch a short clip on renewable resources. Use this clip to answer question #13.

Heat Transfer Keep your headphones on. Click on the link below and watch the tutorial Be sure to follow along and answer the questions on your assignment sheet. After the first slide- click on the NEXT button in the lower right hand corner to continue the tutorial. CLICK HERE TO LEARN ABOUT HEAT TRANSER

Water movement Hot water rises Cools at the surface Convection currents Cooler water sinks

more Kinetic Energy -> higher temperature Temperature and Heat Kinetic energy is the energy of motion Temperature : a measure of the average amount of kinetic energy amongst the atoms in a substance. more Kinetic Energy -> higher temperature less Kinetic Energy -> lower temperature

What are the three different temperature scales? Fahrenheit is the temperature scale we use for our weather- water freezes at 32.0ºF and boils at 212.0 ˚F Celsius “centigrade” is the metric scale for measuring temperature- if you live in Europe you’d love it if the temperature was 27 ºC- Water freezes at 0ºC and boils at 100ºC The Kelvin scale the SI base unit for temperature (K)- like the meter is the base unit for length Water freezes 273 K – boils 373 K

Equations Needed to Convert from one temperature scale to another! K = °C + 273 °C = K – 273 °F = (°C  1.8) + 32 °C = ° F – 32 1.8

Temperature Conversion PRACTICE A. How warm would it be in Europe if the temperature was 27.0°C? Convert to Fahrenheit. First choose the third Equation Write it down. Plug the 27 into the spot where there is °C. Put this into your calculator. Record the answer! B. Convert 45 °Celsius to Kelvin First choose the first Equation Write it down. Plug the 45 into the spot where there is °C. Put this into your calculator. Record the answer!

More Practice Convert 354.0 K to degree Celsius First choose the second Equation Write it down. Plug the 354.0 into the spot where the K is. Put this into your calculator. Record the answer! D. Convert 99.0 degree Fahrenheit to Celsius. First choose the fourth Equation Write it down. Plug the 99.0 into the spot where the °F is. Put this into your calculator. Record the answer!

And More Practice Convert 376 K into Fahrenheit. Record your answer! choose the second equation. Write it down. Put the 376 where the K is. Plug into your calculator. Record this answer. NOW: choose the third equation. Place your answer where the °F is. Record your answer!