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Heat Transfer Vocab
Heat Transfer Vocabulary
Term | Definition |
---|---|
temperature | A measure of the average kinetic energy of the particles in an object. A measure of how hot or cold something is. |
kinetic molecular theory | Faster moving molecules have more energy, so have a higher temperature. |
thermometer | A tool or device to measure the average kinetic energy of particles. The thermometer is based on thermal expansion due to the movement of particles. |
Fahrenheit | A temperature scale to measure the kinetic energy of particles (degrees F). 32 degrees F is the temperature of freezing water, 212 degrees F is boiling water. |
celsius | A temperature scale assigning 0 degrees as the freezing temperature for pure water and 100 degrees as the boiling point. |
kelvin | The absolute temperature scale. It is theorized at 0 on this scale all particle motion stops. |
matter | Anything that has mass and volume is this. |
absolute zero | The lowest temperature on the kelvin scale. |
thermal conductor | Can transfer heat easily. |
heat | energy transferred from a warmer object to a cooler object. Kinetic energy that is transferred between objects at different temperatures. |
thermal insulator | An object or material that reduces the transfer of heat. |
convection | Heat transfer through a fluid. The faster moving particles are less dense so pushed to the surface, the slower moving particles are more densely packed so drop. |
radiation | Heat transfer with no contact. Can be transferred through empty space, infrared, electromagnetic. |
specific heat | The amount of heat per unit of mass required to raise the temperature by one degree Celsius. |
conduction | When heat is directly transferred through an object. Objects have to be in contact. |
phase change | The change of a substance from one physical state to another. Solid, liquid, gas |
freezing point | The temperature at which a liquid turns into a solid. |
boiling point | The temperature that a liquid changes phase to a gas. |
phase change | The change of a substance from one physical state to another |
melting | change of state from a solid to a liquid. |
freezing | The change of state from a liquid to a solid. |
condensation | Occurs when water particles in a gas, slow down enough to attract each other and become a liquid. |
vaporization | Occurs when the particles of a liquid move fast enough to break their attraction for each other and become a gas. |
boiling | When the particles move fast enough to break their attraction for each other and become a gas. |
evaporation | When the particles on the surface of a liquid move fast enough to break their attraction for each other and become a gas. |
sublimation | The transition of a substance directly from a solid to a gas. |