Assume that you are using an open-end manometer filled with mineral oil rather than mercury. The...
Assume that you are using an open-end manometer filled with mineral oil rather than mercury. The level of mineral oil in the arm connected to the bulb is 243 mm higher than the level in the arm connected to the atmosphere and atmospheric pressure is 741 mmHg.
What is the gas pressure in the bulb in mm of Hg? (The density of mercury is 13.6 g/mL, and the density of mineral oil is 0.822 g/mL.)
Express your answer with the appropriate units.
Homework Answers
mineral oil equivalent pressure to mercury pressure = higher pressure x oil density / mercury density
= 243 x 0.822 / 13.6
= 14.687 mm equivalent to Hg
now gas pressure in the buld = atmospheric pressure - calculated pressure equivalent to Hg
= 741 -14.687
= 726.3 mmHg
gas pressure inside = 726.3 mmHg
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