Question

a manometer is connected to a gas containing bulb. the open arm reads 53.3 cm, whereas the armconnected to the bulb reads 15.6 cm. if the barometric pressure is 763 mm hg, then what is thepressure of the gas in atm?

Answer 1

The pressure of the gas in atm is 0.496 atm. To find the pressure of the gas in atm, we need to apply the concept of a closed-ended manometer. The pressure of the gas in atm is determined by dividing the pressure of the gas in mm Hg by the atmospheric pressure in mm Hg/atm.

Step-by-step explanation:

To find the pressure of the gas in atm, we need to apply the concept of a closed-ended manometer.

In a closed-ended manometer, the difference in heights of the two arms of the U-tube represents the gas pressure.

Here, the difference in heights is 53.3 cm - 15.6 cm = 37.7 cm.

To convert this height to mm Hg, we multiply by 10 since 1 cm = 10 mm.

Therefore, the pressure of the gas in mm Hg is 37.7 cm x 10 mm/cm = 377 mm Hg.

To convert this pressure to atm, we divide by the atmospheric pressure of 760 mm Hg.

So, the pressure of the gas in atm is 377 mm Hg / 760 mm Hg/atm = 0.496 atm.