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Published byDebra Rose Modified over 9 years ago
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» Heat and temperature are not the same. ˃Consider the picture below, both spoons are absorbing the same amount of heat. +But the metal spoon’s temperature is much higher.
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» Temperature is a measure of the average kinetic energy of a sample of matter. ˃Remember the kinetic molecular theory that states, “particles move faster when a gases temperature is increased.”
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» Heat is thermal energy that is being transferred between 2 objects. » Which way does heat flow? ˃From objects with higher temperatures to ones with lower temperatures? ˃From objects with lower temperatures to ones with higher temperatures?
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» The units for heat are joules (J) or kilojoules (kJ). » Heat cannot be measured directly. » We can only measure the temperature changed caused by a transfer of heat.
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Things heat up or cool down at different rates. Land heats up and cools down faster than water, and aren’t we lucky for that!? The specific heat (c) of a substance is the amount of heat (q) required to raise the temperature of one gram of the substance by one degree Celsius. water = 4184 J / kg °C (“holds” its heat) sand = 664 J / kg °C (less Energy to change) This is why land heats up quickly during the day & cools quickly at night and why water takes longer.
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