Question

3.21.*A vacuum chamber has a volume of 10 ft³. When the vacuum pump is running, the steady-state pressure in the chamber is 0.1 psia. The pump is shut off, and the following pressure-time data are observed: Time after shutoff, min 0 10 20 30 Pressure, psia 0.1 1.1 2.1 3.1 Calculate the rate of air leakage into the vacuum chamber when the pump is running. Air may be assumed to be an ideal gas. The air temperature may be assumed constant at 68°F.

          3.21.*A vacuum chamber has a volume of 10 ft³. When the vacuum pump is running, the steady-state pressure in the chamber is 0.1 psia. The pump is shut off, and the following pressure-time data are observed:

Time after shutoff, min
0
10
20
30
Pressure, psia
0.1
1.1
2.1
3.1

Calculate the rate of air leakage into the vacuum chamber when the pump is running. Air may be assumed to be an ideal gas. The air temperature may be assumed constant at 68°F.

3.21.*A vacuum chamber has a volume of 10 ft³. When the vacuum pump is running, the steady-state pressure in the chamber is 0.1 psia. The pump is shut off, and the following pressure-time data are observed:

Time after shutoff, min
0
10
20
30
Pressure, psia
0.1
1.1
2.1
3.1

Calculate the rate of air leakage into the vacuum chamber when the pump is running. Air may be assumed to be an ideal gas. The air temperature may be assumed constant at 68°F.

Added by Ryan B.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Umang S

02/25/2022

Step 1

The rate of pressure increase can be calculated from the slope of the line formed by any two data points. Let's use the first and last data points: $\frac{\Delta P}{\Delta t} = \frac{3.1 \text{ psia} - 0.1 \text{ psia}}{30 \text{ min} - 0 \text{ min}} = \frac{3 Show more…

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3.21.*A vacuum chamber has a volume of 10 ft³. When the vacuum pump is running, the steady-state pressure in the chamber is 0.1 psia. The pump is shut off, and the following pressure-time data are observed: Time after shutoff, min | Pressure, psia ------- | -------- 0 | 0.1 10 | 1.1 20 | 2.1 30 | 3.1 Calculate the rate of air leakage into the vacuum chamber when the pump is running. Air may be assumed to be an ideal gas. The air temperature may be assumed constant at 68°F.