Heat and Heat Transfer Heat.

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Presentation transcript:

Heat and Heat Transfer Heat

Announcements Vocab quiz tomorrow! Heat exam on Friday!

Scales of Measurement Celsius scale – based on where water freezes (0C) and where water boils (100C) Kelvin scale – based on the movement of particles

Absolute Zero At 0 K, all particle movement has ceased It is impossible to have a temperature lower than 0 K 0 K = -273C

Kinetic-Molecular Theory The faster particles move, the greater the kinetic energy or thermal energy.

Temperature –average kinetic energy of the particles in a substance Definitions Temperature –average kinetic energy of the particles in a substance Thermometers measure temperature Heat – amount of energy transferred

Thermal equilibrium Energy will always travel from an area of higher energy to an area of lower energy.

Conduction: energy transfer between solids. Heat transfer Conduction: energy transfer between solids. Convection: mass motion of a fluid (liquid or gas) Radiation: emission of EM waves, no medium needed

Specific Heat Amount of energy that must be added to the material to raise the temperature of a unit mass one temperature unit. The units of specific heat are J/kg·K or J/kg·°C

Law of Conservation of Energy Energy lost by one object must be equal to the amount gained by another object.