Specific heat capacity: Difference between revisions

Latest revision as of 00:00, 14 August 2026

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Atmosphere#Specific Heat Capacity

Specific heat capacity (SHC):

The specific heat capacity is defined as the amount of energy (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C). Source

Simply put this means the higher the SHC the more joules of energy (heat) it takes to increase or decrease the temperature. This also means that a higher SHC fluid will take longer to cool down or heat up in a radiator which is more efficient. If you were using a low SHC fluid then that fluid would reach equilibrium faster and you would need to bring more fluid to the radiator to keep heating or cooling the area.

You must of course balance this with your requirements in so far as temperature and pressure are concerned as passing these limits in either direction will cause a phase change, which can be a bad thing if unexpected.

Fluid	J(kg K)
Methane (CH4)	20.4
Hydrogen (H2)	20.4
Nitrous Oxide (N2O)	37.2
Nitrogen (N)	20.6
Carbon Dioxide (CO2)	28.2
Oxygen (O2)	21.1
Pollutant (POL)	24.8
Water (H2O)	72.0
Hydrazine (N2H4)	48.4
Polluted Water (PW)	64.0
Alcohol (ALC)	33.0
Helium	20.8
Sodium Chloride (NaCl)	130.0
Silanol	101.0
Hydrochloric Acid (HCl)	37.0
Ozone	38.6

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 <big>Specific heat capacity (SHC):</big>
-The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
+The specific heat capacity is defined as the amount of energy (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
 [https://www.sciencedirect.com/topics/engineering/specific-heat-capacity#:~:text=The%20specific%20heat%20capacity%20is,J%2F(kg%20%C2%B0C). Source]
-Basically, the higher the SHC the more heat energy need to raise the temperature in the material.
+Simply put this means the higher the SHC the more joules of energy (heat) it takes to increase or decrease the temperature. This also means that a higher SHC fluid will take longer to cool down or heat up in a radiator which is more efficient. If you were using a low SHC fluid then that fluid would reach equilibrium faster and you would need to bring more fluid to the radiator to keep heating or cooling the area.
-The higher this property is the better a material is as a heat buffer against temp spikes up or down.
+You must of course balance this with your requirements in so far as temperature and pressure are concerned as passing these limits in either direction will cause a phase change, which can be a bad thing if unexpected.
-When combined with a high conductivity material to dissipate the heat, you can make a cooling system that works very energy efficiently and with little fluctuations in the environment you are controlling the temperature for.
+{| class="wikitable sortable"
+|-
-Volatiles: 20.4 Joule / mol
+! Fluid !! J(kg K)
+|-
-Nitrous oxide: 23 Joule / mol
+| Methane (CH4) || 20.4
+|-
-Nitrogen: 20.6 joule / mol
+|Hydrogen (H2)
+|20.4
-Carbon: dioxide: 28.2 Joule / mol
+|-
+| Nitrous Oxide (N2O) || 37.2
-Oxygen: 21.1 Joule / mol
+|-
+| Nitrogen (N) || 20.6
-Pollutant: 24.8 Joule / mol
+|-
+| Carbon Dioxide (CO2) || 28.2
-Water (H2O): 72 Joule / mol
+|-
+| Oxygen (O2) || 21.1
+|-
+| Pollutant (POL) || 24.8
+|-
+| Water (H2O) || 72.0
+|-
+|Hydrazine (N2H4)
+|48.4
+|-
+|Polluted Water (PW)
+|64.0
+|-
+|Alcohol (ALC)
+|33.0
+|-
+|Helium
+|20.8
+|-
+|Sodium Chloride (NaCl)
+|130.0
+|-
+|Silanol
+|101.0
+|-
+|Hydrochloric Acid (HCl)
+|37.0
+|-
+|Ozone
+|38.6
+|}