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unit

Specific entropy

Definition

The specific entropy is the physical measure, which defines the ratio value of the substance, body, environment entropy to its mass.

1 joule per kilogam kelvin is the specific entropy change of the substance, body or environment weighing 1 kilogram at 1 joule per kelvin.

 

system of units:   SI;
statute:   derived unit (with a special name);
name the value:   s;
unit name:   joule per kilogram kelvin;
symbol unit:   J/(kg·K);
relationship of definition:   s = ΔS/m;
dimension:   L2 T-2 Θ-1;
expression in other units:   cal/(g·K), Btu/(lb·0F);

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Units of measurement

namesymbol value in SI unit:
J/(kg·K)
note
1 BtuIT per pound degree fahrenheitBtuIT/(lb·°F)= 4 186.8(1), (2)
1 Btuth per pound degree fahrenheitBtuth/(lb·°F)= 4 184(1), (3)
1 BtuIT per pound degree rankineBtuIT/(lb·°R)= 4 186.8(1), (2)
1 Btuth per pound degree rankineBtuth/(lb·°R)= 4 184(1), (3)
1 calorieIT per gram degree celsiuscalIT/(g·°C)= 4 186.8(2)
1 calorieth per gram degree celsiuscalth/(g·°C)= 4 184(3)
1 calorieIT per gram kelvincalIT/(g·K)= 4 186.8(2)
1 calorieth per gram kelvincalth/(g·K)= 4 184(3)
1 joule per gram kelvinJ/(g·K)= 1 000 
1 joule per kilogram degree celsiusJ/(kg·°C)= 1.0 

Note:

(1) - Btu - British thermal unit;

(2) - IT - common unit, international;

(3) - th - thermochemical unit;