Heat capacity: Difference between revisions
Jump to navigation
Jump to search
imported>Daniel Mietchen (brought over from specific heat ratio) |
imported>Daniel Mietchen m (intrawiki link) |
||
| Line 1: | Line 1: | ||
{{subpages}} | {{subpages}} | ||
The '''heat capacity''' (as distinct from [[specific heat]]) is the amount of heat required to increase the temperature of any stated [[amount of substance]] (rather than a unit amount) by 1 [[kelvin]]. Heat capacity is an [[extensive property]], i.e. its value is proportional to the amount of the substance. For example, a kilogram of water has a greater heat capacity than 100 grams of water. The heat capacity is usually expressed as [[Joule|J]]K<sup>-1</sup>. | The '''heat capacity''' (as distinct from [[specific heat]]) is the amount of heat required to increase the [[temperature]] of any stated [[amount of substance]] (rather than a unit amount) by 1 [[kelvin]]. Heat capacity is an [[extensive property]], i.e. its value is proportional to the amount of the substance. For example, a kilogram of water has a greater heat capacity than 100 grams of water. The heat capacity is usually expressed as [[Joule|J]]K<sup>-1</sup>. | ||
''Specific heat capacities'' and ''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. | ''Specific heat capacities'' and ''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 06:05, 15 April 2009
The heat capacity (as distinct from specific heat) is the amount of heat required to increase the temperature of any stated amount of substance (rather than a unit amount) by 1 kelvin. Heat capacity is an extensive property, i.e. its value is proportional to the amount of the substance. For example, a kilogram of water has a greater heat capacity than 100 grams of water. The heat capacity is usually expressed as JK-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.
