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unit

Heat capacity

Definition

The heat capacity is the physical measure, which defines the system by the ratio of the amount of heat required for heating or cooling the system or body, to the difference of body temperature.

1 joule per kelvin is the heat capacity to increase/decrease the temperature by 1 kelvin at assimilation/disposal of a quantity of heat of 1 joule.

 

system of units:   SI;
statute:   derived unit;
name the value:   C;
unit name:   joule per kelvin;
symbol unit:   J/K;
relationship of definition:   C = Q/T;
dimension:   L2 M T-2 Θ-1;
expression in other units:   cal/K, Btu/°F;

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Units of measurement

namesymbol value in SI unit:
J/K
note
1 BtuIT per degree fahrenheitBtuIT/°F≈ 1 899.101(1), (2)
1 Btuth per degree fahrenheitBtuth/°F≈ 1 897.830(1), (3)
1 BtuIT per degree rankineBtuIT/°R≈ 1 899.101(1), (2)
1 Btuth per degree rankineBtuth/°R≈ 1 897.830(1), (3)
1 calorieIT per degree celsiuscalIT/°C≈ 4 186.8(2)
1 calorieth per degree celsiuscalth/°C≈ 4 184(3)
1 calorieIT per kelvincalIT/K≈ 4 186.8(2)
1 calorieth per kelvincalth/K≈ 4 184(3)

Note:

(1) - Btu - British thermal unit;

(2) - IT - common unit, international;

(3) - th - thermochemical unit;