Atmospheric pressure (atm) to torr, torr to atm

 

1 atm is equal to 760 torr. 1 torr is equal to 0.001316 atm.

Depending on the starting point and type of the calculations, the following types of pressure are distinguished:

 

An absolute concept corresponds to the definition of pressure. Zero absolute pressure has a complete vacuum, which is unattainable in practice. This phenomenon cannot take negative values. It is absolute pressure that is used in all formulas of molecular physics and thermodynamics, in particular, when calculating the density of gases, when determining the aggregate state of matter.

 

Atmospheric one is the absolute pressure of atmospheric air at the Earth's surface. This phenomenon depends on the altitude above sea level, acceleration due to gravity and weather conditions, and is usually within 93 ... 104 kPa (700 ... 780 mm Hg). Normal atmospheric pressure is taken to be equal to 101.325 kPa (760 mm Hg, 1 atm).

 

Excess pressure - measured relative to atmospheric. Zero excess parameter means the equality of the absolute pressure of the environment and atmospheric pressure. Positive excess pressure is found in environments with absolute pressure greater than atmospheric pressure. Negative excess pressure corresponds to rarefied environments and vacuum and is often referred to as 'vacuum pressure' or 'vacuum'. In this case, excess pressure is understood to mean only pressure greater than atmospheric pressure.

 

Differential pressure refers to the difference in pressure between two distinct environments. This value, which is vacuum, is a very important parameter in environmental measurements relative to atmospheric pressure. Thus, by measuring the pressure difference, we can calculate excess pressure and vacuum.