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Heat-sci
physical science heat section
| Question | Answer |
|---|---|
| an explanation of how particles in matter behave | Kinetic-Particle Theory |
| what are the five assumptions | 1. all matter is composed of small particles 2. in constant, random motion 3. the more massive, the slower it moves 4. speed is increased by adding heat and decreased by removing heat 5. if all heat is removed, its temp is absolute zero |
| the sum of the kinetic and potential energy of all the particles in an object | thermal energy |
| measure of the average kinetic energy of the particles in the object | temperature |
| thermal energy that flows from something at a higher temperature to something at a lower temperature | heat |
| what is heat measured in? | joules |
| heat always flows from ____ to ____ materials | warmer; cooler |
| the amount of heat needed to raise the temperature one gram of water 1 degree Celsius | calorie |
| the heat needed to raise the temperature of 1 kg of water 1 degree Celsius | Calorie (kilocalorie) |
| does heat have mass? | no |
| can you directly measure heat? | no only its effect |
| what temperature does water boil at in Kelvin? Celsius? Fahrenheit? | 373; 100; 212 |
| what temperature does water freeze in Kelvin? Celsius? Fahrenheit? | 273; 0; 32 |
| what temperature is absolute zero in Kelvin? Celsius? Fahrenheit? | 0; -273; -460 |