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If the measurement indicates a vacuum of 150 Torr, what will be the absolute pressure?

If the measurement indicates a vacuum of 150 Torr, what will be the absolute pressure? Correct Answer 610 Torr

Different types of pressure:

1.) Absolute pressure:

  • Absolute pressure is the pressure of having no matter inside a space or a perfect vacuum.
  • Measurements are taken in absolute pressure and use this absolute zero as their reference point.
  • The best example of an absolute referenced pressure is the measurement of barometric pressure.

2.) Atmospheric pressure:

  • Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of the earth.
  • A standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 1013.25 millibars, 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.

3.) Vaccum pressure:

  • Vacuum pressure is measured relative to ambient atmospheric pressure.
  • It is referred to as pounds per square inch (vacuum).

The relationship between absolute, atmospheric, and vacuum pressure is given by:

Absolute pressure = Atmospheric pressure - Vaccum pressure

Atmospheric pressure = 1 atm = 760 Torr

Calculation:

Given, Vacuum pressure = 150 Torr

Absolute pressure = 760 - 150 

Absolute pressure = 610 Torr

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