Ch 17 And 18

25 July 2022
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The molecules in a room temperature glass of water jostle around at
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a great variety of speeds
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The reason that evaporation is a cooling process is
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the more energetic molecules escape the liquid
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The surface of hot water has a relatively high rate of
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evaporation
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When slow moving water molecules collide they tend to
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stick
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Evaporation is a cooling process and condensation is
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a warming process
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We feel uncomfortably warm on a muggy day because water molecules are
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condensing our bodies
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Water can be brought to a boil by
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reducing air pressure and applying heat
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Food in a pressure cooker is cooked faster due to
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higher temperature
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The most responsible factor for whether a substance takes the phase of solid, liquid, gas, or plasma is its
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temperature
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When water freezes, the surrounding air is
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warmed
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The first law of thermodynamics is a restatement of the conservation of
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energy
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A volume of air that is compresses with no heat entering or leaving becomes
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warmer
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The contained air in a closed, sealed can placed on a hot stove will undergo an increase in
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pressure, temperature, and internal energy
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An adiabatic process is characterized by the absence of
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heat exchange
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During an adiabatic compression of an ideal gas
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no heat enters or leaves the gas
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A temperature inversion occurs when the upper layers of air are
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warmer than the lower regions of air
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As a parcel of air is swept upward, with no heat input or output, its temperature
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decreases
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Entropy is a measure of
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disorder and messiness
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As a system becomes more disordered, entropy
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increases
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A hot dog pants
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to enable evaporation in its mouth and bronchial tract
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Double-pane windows contain nitrogen rather than air to prevent
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condensation
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When fast moving water molecules collide, they tend to
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rebound without sticking
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Increased air pressure on the surface of hot water tends to
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prevent boiling
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Water can be turned to ice by
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lowering the surrounding air pressure and extracting energy
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Foreign ion introduced to water
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lower the freezing point of water
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When you walk barefoot on red-hot wooden coals, it is best if
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no pieces of metal are among the coals
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When a solid is changed to a liquid, the solid
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absorbs energy
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When water freezes, the surrounding area is
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warmed
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Firefighters find that the temperature of burning material is best lowered when water is
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sprayed as a fine mist
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Water freezes at atmospheric pressure and a temperature of
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0 Celsius, 32 F, 273 Kelvin
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A volume of air that is compressed with no heat entering or leaving becomes
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warmer
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In the formation of a cloud, moist air rises and
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cools, expands, and condenses