Question
Download Solution PDFIf the gauge pressure of air in a cylinder is 250 kPa, then it’s absolute pressure will be _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Absolute pressure is the sum of gauge pressure (\(P_g\)) and atmospheric pressure (\(P_{atm}\)).
Its value cannot be negative.
\(P_{abs} = P_g + P_{atm} \)
At sea level value of atmospheric pressure is 101.3 kPa.
Gauge pressure is relative to atmospheric pressure. It is positive for pressures above atmospheric pressure and negative for pressures below it.
Calculation:
Given:
\(P_g\) = 250 kPa;
\(P_{abs} = P_g + P_{atm} \)
\(P_{abs} \) = 250 + 101.3
\(P_{abs} \) = 351.3 kPa ≈ 350 kPa.
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