Question

Marshall determines that a gas has gauge pressure of 276 kPa.Whats the absolute value of this gas?

Answer 1

A gauge records the pressure over atmospheric pressure (0kpa on the gauge is actually the atmospheric pressure and a reading of 276kpa is 276kpa over atmospheric pressure). That means that means that to find absolute pressure you just add atmospheric pressure (around 1atm (101kpa)) to 286kpa to get 387kpa.

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