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| Heat is defined as the transfer of` |
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| T/F - Convection occurs when 2 objects at different temperatures touch each other, and heat flows from the hotter object to the cooler object. |
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| 32 degrees F is ______ Kelvin or _____ degrees C. |
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| _______ measures the average kinetic energy of an object's particles. |
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| ______ measures the total energy of the particles in an object. |
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| List the 3 factors that determine the amount of thermal energy in an object |
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| temperature, mass, specific heat |
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| Heat flow in gases is largely mediated by___. |
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| T/F - Air is an excellent conductor of thermal energy. |
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| T/F - The higher the R-value the more effective is the insulating material. |
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| _________ is the branch of physics that deals specifically with the transformation of thermal energy into other forms of energy and into work. |
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| The ________ law of thermodynamics specifies that heat cannot travel from a cold object to a hot object. |
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| The ______ law of thermodynamics predicts the impossibility of attaining 0 Kelvin. |
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| The _____ law of thermodynamics restates the Law of Conservation of Energy. |
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| The _________ law of thermodynamics states that 2 systems in thermal equilibrium with a third system are in equilibrium with each other. |
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| The amount of thermal energy in calories needed to raise the temperature of 1 g of a substance 1 °C. (cal/g °C or kcal/kg °C). |
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Definition
| The amount of thermal energy required to increase the temperature of 1 g of water 1 degree C. |
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| What is a "large" calorie? |
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Definition
| 1000 calories; a kilocalorie (kcal). |
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| How many small calories are needed to heat a kg of water from 4 degrees C to 5 degrees C? |
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| How many small calories are needed to heat 0.5 liters of water from 4 degrees C to 5 degrees C? |
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| Solids which readily transfer heat energy are called _______. |
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| Substances that tend to prevent the transfer of heat energy are called _________. |
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| T/F - Ironically, good thermal conductors are generally poor electrical conductors. |
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| _______ is the SI unit for (thermal) energy. |
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| Of the Three mechanisms by which heat travels from one object to another, which requires physical contact? |
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| The _____ law of thermodynamics is often referred to as the law of entropy. |
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| T/F - A kcal is the amount of thermal energy needed to raise the temperature of iron, gold and air by 1 degree C. |
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| T/F - A kg of water at 25 degrees C contains more thermal energy than a kg of gold at 25 degrees C. |
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| T/F - Latent ("invisible") heat is the energy released or absorbed during a change of state. |
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| T/F - When water boils more calories are released then when water freezes. |
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| The amount of disorder and randomness in a system; unusable energy. |
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| T/F - Thermal equilibrium is reached between two objects when they attain the same specific heat. |
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| Railroad tracks have been known to buckle on unusually hot and sunny days. Explain what causes the tracks to buckle. |
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| A hypothetical fluid was once believed, albeit wrongly, to be responsible for the production, possession, and transfer of heat was called _________. |
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| Describe why direct exposure to steam heat causes worse burns then direct exposure to boiling water. |
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| Because the fusion of heat from the steam on a surface (like a hand) releases more energy than it does as a boiling liquid. |
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| Describe how heat can raise the temperature of a volume of gas. |
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