Specific heat: Difference between revisions
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The '''specific heat''' (or ''specific heat capacity'') is the amount of heat required to increase the temperature of a [[amount of substance|unit amount of a substance]] by 1 [[Kelvin (unit)|kelvin]]. For example, the heat required to raise the temperature of 1 gram of water by 1 kelvin is 4.184 [[Joule (unit)|joule]]s. The specific heat capacity is usually expressed as Jg<sup>-1</sup>K<sup>-1</sup>. It may also be expressed on a molar basis as Jmol<sup>-1</sup>K<sup>-1</sup>. | The '''specific heat''' (or ''specific heat capacity'') is the amount of [[heat]] required to increase the [[temperature]] of a [[amount of substance|unit amount of a substance]] by 1 [[Kelvin (unit)|kelvin]]. For example, the heat required to raise the temperature of 1 gram of water by 1 kelvin is 4.184 [[Joule (unit)|joule]]s. The specific heat capacity is usually expressed as Jg<sup>-1</sup>K<sup>-1</sup>. It may also be expressed on a [[mole (unit)|molar]] basis as Jmol<sup>-1</sup>K<sup>-1</sup>. | ||
Specific heat capacities and [[heat capacity|heat capacities]] have the same symbols of <math>C_p</math> and <math>C_v</math>. The [[specific heat ratio]], <math>k</math>, has the same numeric value whether based on ''specific heats'' or ''heat capacities'', since the respective amounts of substance cancel out. | |||
Latest revision as of 06:04, 15 April 2009
The specific heat (or specific heat capacity) is the amount of heat required to increase the temperature of a unit amount of a substance by 1 kelvin. For example, the heat required to raise the temperature of 1 gram of water by 1 kelvin is 4.184 joules. The specific heat capacity is usually expressed as Jg-1K-1. It may also be expressed on a molar basis as Jmol-1K-1.
Specific heat capacities and heat capacities have the same symbols of and . The specific heat ratio, , has the same numeric value whether based on specific heats or heat capacities, since the respective amounts of substance cancel out.
