Heat Definitions Flashcards

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1
Q

Temperature is:

A

Temperature is: a measure of the degree of hotness or coldness of a body. [K]

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2
Q

Temperature in degree Celsius =

A

Temperature in degree Celsius = Temperature in Kelvin – 273.15

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3
Q

A thermometric property is:

A

A thermometric property is: a physical property that changes measurably with temperature.

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4
Q

Heat is:

A

Heat is: a form of energy that causes a change in temperature or a change of state of a body. [J]

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5
Q

Heat capacity of a body is:

A

Heat capacity of a body is: the energy needed to raise the temperature of a body by 1 Kelvin. [J/K]

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6
Q

Specific heat capacity of a substance is:

A

Specific heat capacity of a substance is: the energy required to raise the temperature of 1kg of a substance by 1 Kelvin. [J Kg-1 K-1]

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7
Q

Latent heat is:

A

Latent heat is: the energy required to change the state of a body without a change in temperature. [J]

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8
Q

Specific latent heat is:

A

Specific latent heat is: the energy required to change the state of 1 kilogram of a substance without a change in temperature. [J/kg]

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9
Q

Specific latent heat of fusion of ice is:

A

Specific latent heat of fusion of ice is: the energy required to change the state of 1 kg of ice from a solid to a liquid without a change in temperature. [J/kg]

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10
Q

Specific latent heat of vaporization of water is:

A

Specific latent heat of vaporization of water is: the energy required to change the state of 1 kg of water from a liquid to a gas without a change in temperature. [J/kg]

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11
Q

Conduction is:

A

Conduction is: the transfer of heat energy through a substance from particle to particle without any net movement of the particles. [requires a medium]

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12
Q

Convection is:

A

Convection is: the transfer of heat energy through a fluid or gas by the circulation of the fluid. [needs a medium]

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13
Q

Radiation is:

A

Radiation is: the transfer of heat energy by electromagnetic magnetic waves [infrared]. E.g., photos, radiation.

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14
Q

U-value is:

A

U-value is: the amount of heat energy conducted per second through 1m^2 of a structure when a temperature difference of 1K is maintained between its ends.
[W/m^2 K^1]

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15
Q

Solar constant [solar irradiance] is:

A

Solar constant [solar irradiance] is: the average energy from the sun falling per second normally on 1m^2 of the Earth’s surface. [W/m^2]

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16
Q

Boiling occurs:

A

Boiling occurs throughout the liquid.

17
Q

Evaporation occurs:

A

Evaporation occurs: at the surface of the liquid.