This set covers A Beka Book Physics Chapter 14: "Heat" (pages 206-221).

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  • internal energy

    term for the measure of an object's molecular kinetic energy and molecular potential energy

    heat

    term for the transfer of internal energy from one object to another

    True

    True or False: Heat always moves from a hotter object to a cooler object.

    thermometers

    term for instruments that measure temperature

    thermometry

    term for the process of measuring temperature

    thermal equilibrium

    term for the state in which who objects are the same temperature

    triple point

    term for the temperature at which the three phases of water achieve equilibrium

    4.58 mm Hg and 0 degrees C

    pressure and temperature of the triple point of water

    Gabriel Daniel Fahrenheit

    German physicist who invented the mercury thermometer in 1714

    Celsius scale

    the standard termperature scale employed for scientific purposes

    1/273

    When the temperature of a gas rises one degree Celsius, the gas expands by about ___ of its volume at 0 degrees Celsius.

    absolute zero

    term for the lowest obtainable temperature at which all gases should vanish

    -273.15

    absolute zero in degrees Celsius

    absolute scale

    The Kelvin scale of temperature is called a(n) ____ ____ because its lowest possible temperature has the value of 0 K.

    0 degrees

    the ice point on the Celsius scale

    273.15

    the ice point on the Kelvin scale

    Sir William Thomson (Lord Kelvin)

    great nineteenth century physicist who devised the Kelvin scale of temperature

    expands

    When its temperature rises, a solid ____ in every direction.

    linear expansion

    term for the expansion along any line through a solid

    α

    letter that represents the coefficient of linear expansion

    True

    True or False: Heat causes greater expansion of liquids than of solids.

    calorie

    a common unit of heat

    joule

    the metric unit of heat

    4.184

    One calorie equals ___ Joule(s).

    one

    In general, it takes about __ calorie(s) to raise a gram of water one degree Celsius.

    heat capacity

    term for the heat required to raise a body's temperature by one degree

    specific heat

    term for the heat required to raise the temperature of a unit mass by one degree

    -Q lost = Q gained

    equation for the law of heat exchange

    melting

    term for a solid changing into a liquid

    endothermic

    Since a solid will not actually enter the liquid phase unless heat is supplied by an external source at the melting point, melting is a(n) _____ process.

    heat of fusion

    term for the heat that must be absorbed per gram to melt a solid

    freezing

    term for a liquid changing into a solid

    exothermic

    Because heat is released spontaneously by a freezing liquid, freezing is a(n) _____ process.

    vaporization

    term for a liquid changing into a gas

    heat of vaporization

    term for the amount of energy a liquid absorbs at its boiling point to change into a gas

    condensation

    term for a gas changing into a liquid (the opposite of vaporization)

    calorimeter

    term for an insulated container in which scientists mix two substances

    calorimetry

    term for the use of a calorimeter to meaure the equilibrium temperature of a mixture

    heat conduction

    term for the transfer of heat energy from one part of a body to another

    thermal conductor

    term for a material that conducts heat efficiently

    thermal insulator

    term for a material that does not conduct heat efficiently

    heat flow

    term for the amount of heat transferred from one end of a segment to the other per unit time

    thermal conductivity

    term for the constant of proportionality, k

    conduction

    the method of heat transfer in which agitated motion is transmitted between molecules in contact with each other

    convection

    the method of heat tranfer in which heat is carried by moving material

    radiation

    the method of heat transfer in which a body at high temperature emits radiation that falls upon another body

    conduction, convection, and radiation

    the three methods of heat tranfer

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