Temperature, Thermal Energy & Heat

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Presentation transcript:

Temperature, Thermal Energy & Heat Investigation 1 Notes September 8, 2015

Thermal Energy and Heat Temperature, thermal energy, and heat are closely related, but they are all different The thermal energy of an object depends on the number of particles in the object, the temperature of the object, and the arrangement of the objects particles When thermal energy is transferred it becomes HEAT (when thermal energy moves from warmer objects to cooler objects)

Heat Transfer

Temperature A measure of the average kinetic energy of the individual particles of matter Joule is another unit for measuring heat

Heat expansion A. The expansion of a substance due to heat B. Most solids, liquids, and gases expand as they are heated

Thermometer A. An instrument used to measure temperature B. Thermometers commonly have alcohol (with dye) or mercury C. Digital thermometers have replaced older ones

Specific Heat A. The ability of a substance to absorb heat energy (specific heat) B. Different substances absorb heat at different rates C. The greater the mass of the object the more heat is absorbed D. A material with high specific heat can absorb a great deal of thermal energy without a great change in temperature.

Practice Change in energy = Use the formula below to calculate thermal energy changes: Change in energy = mass x specific heat x change in temperature How much heat is required to raise the temperature of 5 kilograms of water by 10 kelvins? ______________ How much heat is required to raise the temperature of 6 kilograms of glass by 10 kelvins? ______________ How much heat is required to raise the temperature of 12 kilograms of copper by 10 kelvins? _____________

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