#### The Science of Stages of Matter

5 May, 2023

To understand the workings of compressed air, a basic introduction to physics is helpful, including the 4 stages of matter.

After learning about the basics of physics here, you might want to know more concerning the physical units used to measure different aspects of matter. This can be very helpful when dealing with compressed air. In this article, we will explain the basics of measuring pressure, temperature and thermal capacity.

The force on a square centimeter area of an air column, which runs from sea level to the edge of the atmosphere, is about 10.13 N. Therefore, the absolute atmospheric pressure at sea level is approx. 10.13 x 104 N per square meter, which is equal to 10.13 x 104 Pa (Pascal, the SI unit for pressure). Expressed in another frequently used unit: 1 bar = 1 x 105 Pa. The higher you are above (or below) sea level, the lower (or higher) the atmospheric pressure.

The temperature of a gas is more difficult to define clearly. Temperature is a measure of the kinetic energy in molecules. Molecules move more rapidly the higher the temperature, and movement completely ceases at a temperature of absolute zero. The Kelvin (K) scale is based on this phenomenon, but otherwise is graduated in the same manner as the centigrade or Celsius (C) scale: T = t + 273.2 T = absolute temperature (K) t = centigrade temperature c°

The explanation as to why cp is greater than cV is the expansion work that the gas at a constant pressure must perform. The ratio between cp and cV is called the isentropic exponent or adiabatic exponent, К, and is a function of the number of atoms in the molecules of the substance.

5 May, 2023

To understand the workings of compressed air, a basic introduction to physics is helpful, including the 4 stages of matter.

21 April, 2022

It's useful to understand air compressor measurements regarding matter. This information helps determine the appropriate power and size machine needed.

21 April, 2022

To better understand the physics of air compressor thermodynamics and heat generation, this article discusses the main principles and two gas laws.