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(a) find Pvac (b) Find Patm to get absolute pressure The pressure in a vacuum evaporator was measured by using a U-tube containing mercury. It
(a) find Pvac
The pressure in a vacuum evaporator was measured by using a U-tube containing mercury. It was found to be less than atmospheric pressure by 25 cm of mercury. Calculate the extent by which the pressure in the evaporator is below atmospheric pressure (i.e. the vacuum in the evaporator) in kPa, and also the absolute pressure in the evaporator. The atmospheric pressure is 75.4 cm of mercury and the specific gravity of mercury is 13.6, and the density of water is 1000 kg m 3 (b) Find Patm to get absolute pressure
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