ENGG 201 EXP 3 WORKSHEET
Experiment 3: Vapour Pressure of Liquids
Name:
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RESULTS AND DISCUSSION:
The vapor pressure of iso-propyl alcohol at different temperatures are given in table 1.
TABLE 1. Vapor pressure data of iso-propyl alcohol
Bath Temp (°C)
Pv (mmHg)
30
35
40
45
50
55
60
65
70
75
80
ENGG 201 EXP 3
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2. The vapor pressure data is plotted versus temperature () in Figure 1 below. [ Note: Use MS
Excel to generate the graph]. The vapor pressure …….(increases/decreases) with increase in
temperature in a ….(linear/non-linear) manner.
FIGURE 1…..
3. The logarithm of vapor pressure is plotted as a function of 1/T in Figure 2 below, where T is in
kelvin. The best-fit line and its equation is superimposed. [ Note: Use MS Excel to generate the
graph].
FIGURE 2…..
ENGG 201 EXP 3
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3. From the slope and intercept of the equation of the best-fit line we propose the following vaporpressure correlation:
𝐴
- ln(P) = − 𝑇 + C
Where, P is vapor pressure in …., and T is in K.
And the coefficients are
A=
C=
ENGG 201 EXP 3
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