Gauge pressure = absolute pressure - atmospheric pressure.
Atmospheric pressure (at sea level) is generally taken to be 101.325kPa.
so the answer is (C) = 448.955 kPa
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The gauge pressure is the difference between the absolute pressure and atmospheric pressure. If atmospheric pressure is approximately 101.3 kPa, then the gauge pressure would be 448.980 kPa (550.280 kPa - 101.3 kPa).
The absolute pressure can be calculated by adding the atmospheric pressure to the gauge pressure. If the atmospheric pressure is 101.3 kPa, then the absolute pressure of the gas would be 206 kPa + 101.3 kPa = 307.3 kPa.
Boyle's Law says that PV is constant for ideal gas at a constant temperature. The pressure used should be the absolute pressure, not the gage pressure. Ge the absolute pressure should be obtained using : P = PG + PE where PG = gage pressure ( kPag , psig, etc. ) PE = barometric pressure ( kPaa, psia, etc. ) P = absolute pressure ( kPaa , psia, etc. ) ( PG + PE ) ( V ) = Constant for constant temperature The g in kPag and in psig indicates gage pressure.
At absolute zero, the gas molecules stop moving, hence no pressure is exerted by the gas. This is known as absolute zero pressure.
Boyle's law.
At absolute zero temperature, an ideal gas would theoretically have zero volume and zero pressure. This is because at absolute zero, the kinetic energy of gas particles would be minimal, causing them to come to a complete stop and occupy no volume. Since pressure is the result of gas particles colliding with the walls of their container, zero particle movement would result in zero pressure.