A vacuum gage connected to a tank reads 30 kPa at a location where the barometric reading is 755 mm Hg. Determine the absolute pressure in kPa in the tank
Vacuum gauge pressure= 30 KPa
Barometer reading =755 mm Hg
We know that the barometer always reads atmospheric pressure a given situation.
So atmospheric pressure is equal to 755 mm Hg.
We know that
Density of Hg = 13600 kg/m3
Absolute pressure=atmospheric pressure + gauge pressure
But here given that 30 kPa is a Vacuum pressure, so we will take it as negative.
Absolute pressure=atmospheric pressure + gauge pressure
Absolute pressure
Answer: 70.72 kPs
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