Thermal Physics — Flashcards

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Temperature is the degree of hotness of a body, or the average kinetic energy of molecules. It determines the direction of heat flow between objects. The SI unit is kelvin (K). Other units include deg…

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Using the formula: K = °C + 273 K = 27 + 273 = 300 K Therefore, 27°C equals 300 Kelvin. This is approximately room temperature.

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Thermal equilibrium occurs when two or more bodies have the same temperature and there is no net flow of heat between them. When you pour hot tea into a cup, the tea and cup exchange heat until they r…

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Temperature is a property that measures the degree of hotness (average kinetic energy of molecules), while heat is the energy transferred between bodies due to temperature difference. Temperature is a…

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Heat gained by a cold system = Heat lost by a hot system. When two bodies at different temperatures are brought in contact, the total heat energy is conserved. The hot body loses heat equal to the amo…

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One calorie (cal) is the amount of heat needed to raise the temperature of 1 gram of water by 1°C. One kilocalorie (kcal) is the amount of heat needed to raise the temperature of 1 kilogram of water b…

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Steel containers are used on induction stoves because steel is a ferromagnetic material that can be magnetized by the induction stove's magnetic field. This allows heat to be efficiently generated thr…

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When heat is supplied to a substance, one or more of these changes occur: 1. Temperature rises (most common effect) 2. Change of state (solid to liquid, liquid to gas) 3. Thermal expansion (increase i…