1. Calculate the mean value of the PV column in the table above (in Pa·mL). 2. Copy each PV value from Table 2 into Table 3 below. Next, for each measured PV value, subtract the mean PV value you just calculated. Square the result (the squared deviation). Deviation and standard deviation calculations Deviation = PV - Mean (Pa·mL) Deviation Squared (Pa2·mL2) Reading 1 0.2683324 Reading 2 0.047524 Reading 3 0.004624 Reading 4 0.017424 Reading 5 0.186624 Reading 6 0.399424 Reading 7 0.101124 Reading 8 0.013924 Reading 9 0.001023 Reading 10 0.033124 Reading 11 0.146524
1. Calculate the mean value of the PV column in the table above (in Pa·mL). 2. Copy each PV value from Table 2 into Table 3 below. Next, for each measured PV value, subtract the mean PV value you just calculated. Square the result (the squared deviation). Deviation and standard deviation calculations Deviation = PV - Mean (Pa·mL) Deviation Squared (Pa2·mL2) Reading 1 0.2683324 Reading 2 0.047524 Reading 3 0.004624 Reading 4 0.017424 Reading 5 0.186624 Reading 6 0.399424 Reading 7 0.101124 Reading 8 0.013924 Reading 9 0.001023 Reading 10 0.033124 Reading 11 0.146524
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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the atmospheric pressure in inches Hg (inHg)
30.08Temperature at beginning of measurements (°C)
20.6|
Mass added
|
Syringe volume
|
|
|---|---|---|
|
Reading 1
|
0.0
|
5.0
|
|
Reading 2
|
0.300
|
4.5
|
|
Reading 3
|
0.450
|
4.2
|
|
Reading 4
|
0.650
|
4.1
|
|
Reading 5
|
0.950
|
3.6
|
|
Reading 6
|
1.150
|
3.1
|
|
Reading 7
|
0.200
|
5.4
|
|
Reading 8
|
0.400
|
6.7
|
|
Reading 9
|
0.550
|
7.5
|
|
Reading 10
|
0.700
|
8.4
|
|
Reading 11
|
0.900
|
9.3
|
Temperature at end of measurements (°C)
20.6PV Measurements and Calculations
|
Volsyringe (mL)
|
VolT (mL)
|
Mass added (kg)
|
Force (kg·m/s2)
|
Psyr (Pa)
|
PT (Pa)
|
PV (Pa·mL)
|
|
|---|---|---|---|---|---|---|---|
|
No mass added
Reading 1 |
5.0
|
0.000
|
|||||
|
Increasing the pressure
Reading 2 |
4.5
|
0.300
|
|||||
|
Reading 3
|
4.2
|
0.450
|
|||||
|
Reading 4
|
4.1
|
0.650
|
|||||
|
Reading 5
|
3.6
|
0.950
|
|||||
|
Reading 6
|
3.1
|
1.150
|
|||||
|
Decreasing the pressure
Reading 7 |
5.4
|
0.200
|
|||||
|
Reading 8
|
6.7
|
0.400
|
|||||
|
Reading 9
|
7.5
|
0.550
|
|||||
|
Reading 10
|
8.4
|
0.700
|
|||||
|
Reading 11
|
9.3
|
0.900
|
1. Calculate the mean value of the PV column in the table above (in Pa·mL).
2. Copy each PV value from Table 2 into Table 3 below. Next, for each measured PV value, subtract the mean PV value you just calculated. Square the result (the squared deviation).
Deviation and standard deviation calculations
|
Deviation = PV - Mean (Pa·mL)
|
Deviation Squared (Pa2·mL2)
|
|
|---|---|---|
|
Reading 1
|
0.2683324 | |
|
Reading 2
|
0.047524 | |
|
Reading 3
|
0.004624 | |
|
Reading 4
|
0.017424 | |
|
Reading 5
|
0.186624 | |
|
Reading 6
|
0.399424 | |
|
Reading 7
|
0.101124 | |
|
Reading 8
|
0.013924 | |
|
Reading 9
|
0.001023 | |
|
Reading 10
|
0.033124 | |
|
Reading 11
|
0.146524 |
3. Sum the square deviation (d2) values.
4. Divide the sum of the squared deviations by the number of measurements minus one (N - 1, or 11-1=10).
5. Take the square root of the above number.
6. The Range is the Mean PV, plus or minus the SD. Give the Range (min and max) in decimal numbers.
Minimum of Range:
Minimum of Range:
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