Third Class Notes on Thermodynamic Properties: Temperature, Volume, Density, Pressure

Thermodynamic Properties

Thermodynamics is the study of the conversion of one form of energy to another. To understand the fundamental concept of thermodynamics, it is important to examine and define some properties such as temperature, volume, pressure and density.

Energy is the ability to do work.

Types of energy

  • Heat
  • Kinetic
  • Pneutical
  • Solar/Radiation/ligth
  • Chemical.

Properties of energy

  • Energy is never lost nor created
  • It is transferred from one form to another
  • All types of energy are released as heat


Temperature: temperature of a substance is a measure of the random motion of the molecules of the substance. It is the property that describes the hotness of the substance.

There are mainly four temperature measurements.

Freezing and boiling points for Celsius, Fahrenheit, Kelvin and Rankine 

For Fahrenheit

  • Freezing point: 32 ℉
  • Boiling point: 212 ℉

For Celsius

  • Freezing point: 0 ℃
  • Boiling point: 100 ℃

For Kelvin

  • Freezing point: 273.15 K
  • Boiling point:  373.15 K

For Rankine

  • Freezing point: 491.67 K
  • Boiling Point: 671.67 K
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