Welcome Back Minions

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# Welcome Back Minions - PowerPoint PPT Presentation

Welcome Back Minions. Time to get to work!. Review…. Temperature A measure of the average kinetic energy of the individual particles in matter Fahrenheit Scale 0° Brine (seawater) Freezes 32° Water Freezes 212° Water Boils Celsius Scale 0° Water Freezes 100° Water Boils

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## PowerPoint Slideshow about 'Welcome Back Minions' - lael-harrison

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Presentation Transcript

### Welcome Back Minions

Time to get to work!

Review…
• Temperature
• A measure of the average kinetic energy of the individual particles in matter
• Fahrenheit Scale
• Brine (seawater) Freezes
• 32°
• Water Freezes
• 212°
• Water Boils
• Celsius Scale
• Water Freezes
• 100°
• Water Boils
• Kelvin Scale
• Matter stops moving!
Thermal Energy
• Thermal Energy
• Total energy of all the particles in an object.
• Depends on:
• Number of particles in the object
• Temperature of the object
• Arrangement of the object’s particles
• Which has more Thermal Energy?
• .5 liter of hot chocolate at 75° C
• .25 liter of hot chocolate at 75° C
Bring on the heat!
• When we talk about heat we may mention that an object contains heat, but in fact it contains Thermal Energy.
• So what is heat?
• Why does an ice cube melt in your hand?
• Heat
• Thermal Energy moving from a warmer object to a cooler object.
Getting specific…
• Imagine the beach in early summer…
• Run across the sand… OUCH!!! Feels hot!!!
• Run into the water… BRRR!!! Feels cold!!!
• What is going on here?
• Heat an object = Temperature rises
• BUT!!! Objects do not heat at the same rate.
• Depends on the chemical makeup of the object.
Getting specific…
• Scientist defined a quantity to measure relationship between Heat and Temperature Change.
• Specific Heat
• Raise the Temperature of 1 kilogram of a material by 1 Kelvin
• Joules per Kilogram-Kelvin
Specific Heat…

A material with a high specific heat can absorb a great deal of thermal energy without a great change in temperature.

Final Math…
• Change in energy…

How much heat is required to raise the temperature of 5kg of water by 10K?

Closing…
• What is the difference between Thermal Energy and Temperature?
• What is Heat?
• Which requires more Heat to change Temperature… the sand, or the water at the beach?
Homework…

Chapter 14

Section 2

Pages 479-483

(Don’t forget the vocabulary!)