If the atmospheric pressure is 0.995 atm, what is the pressure of the enclosed gas in each of the three cases depicted in the drawing? Assume that the gray liquid is mercury. (ii)

Video transcript

Hello. In this problem, we are asked to determine the pressures in millimeters of mercury and then closed gas in A. B and C. If the atmospheric pressure is 735 millimeters. Mercury were asked to assume that the grade liquid is mercury beginning with the gas then in a. So the pressure exerted by the gas is able to support a column of mercury as well as the pressure due to the atmosphere since it's open on the end. So the pressure of A then will be equal to the pressure of the column of mercury. Plus that due to the atmosphere. So Karma, Mercury is 355 millimeters And the atmospheric pressure is 735. There's mercury. So our pressure gas in a is 1090. Mercury looking at the gas in B. We again have a column of gas that is able to support column of mercury so it is now closed. So it's not supporting the atmospheric pressure. Just that column Mercury. So the pressure of the gas and be then Will be equal to the pressure exerted by that column of Mercury which is equal to 450 telomeres. Mercury looking at the gas and see, we now see that we again have an open end and so this column due to the pressure of the atmosphere is supporting a column of mercury and also a column of gas. So are atmospheric pressure then is equal to the pressure exerted by the column of mercury plus the pressure exerted by the gas and see so the pressure exerted by our gas and see, then will be equal to the atmospheric pressure minus the pressure due to that calm a mercury. This then will be equal to 735 millimeters of mercury And it's 300 mom. There's mercury, So the pressure of our gas and c is equal to millimeters of mercury. These pressures then correspond to answer a thanks for watching. Hope. This helped.