Part A Given a barometric pressure of 748.5 mmHg , calculate the pressure of gas

Question

Part A

Given a barometric pressure of 748.5 mmHg , calculate the pressure of gas sample (a) as indicated by the manometer. (Figure 1)

Part B

Given a barometric pressure of 748.5 mmHg , calculate the pressure of gas sample (b) as indicated by the manometer. (Figure 2)

Part A

Given a barometric pressure of 748.5 mmHg , calculate the pressure of gas sample (a) as indicated by the manometer. (Figure 1)

Part B

Given a barometric pressure of 748.5 mmHg , calculate the pressure of gas sample (b) as indicated by the manometer. (Figure 2)

Explanation / Answer

A)

we know that

at an equal height , the pressure should be same

so

At the bottom 3.5 cm

prssure of gas = pressure of atmospher + pressure of mercury

we can see that

in this case

there is 7 cm of mercury = 70 mm of mercury

so

pressure of gas = 748.5 + 70

pressure of gas = 818.5 mm Hg

B)

now

consider at 2 cm from the bottom

pressure of atmsophere = pressure of gas + pressure of mercury

in this case

4 cm of mercury = 40 mm of mercury

so

748.5 = pressure of gas + 40

pressure of gas = 708.5 mm Hg

so

pressure of the gas is 708.5 mm Hg

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