Temperature and heat

Temperature vs Heat

Temperature

Thermal state of a substance which determines the direction of heat flow between it and environment or another substance, with heat being transfered from higher temperature to lower temperature.

Heat

A form of energy that can be transfered from higher temperature object/region to lower temperature object/region, the energy being in the form of kinetic energy of the molecules of the substance.

Units

Heat

Heat being a form of energy, unit is Joule (J)

• 1 calorie = 4.1868 J
• 1 calorie is the energy required to raise the temperature of 1 gram of water from 15 C to 16 C.

Temperature

SI unit is Kelvin (K)

1 Kelvin = 1/273.16 of the temperature of triple point of water

• Triple point of water is the temperature at which ice, water and water vapour are all in equilbrium
  ---> = 0.01 degree Celcius

Other notes

Heat capacity

Specific heat capacity - the amount of heat required to raised the temperature of 1 kg of a substance by 1 kelvin.
* Unit = J/kg/K

Heat capacity - the amount of heat required to raise the temperature of a given object by 1 kelvin
* Unit = J/K

Tissue specific heat capacity is approximately 3.5kJ/kg/C

Solubility

Solubility is constant for a particular gas and a particular liquid at a particular temperature.

Solubility of gas usually drops with rising temperature.