You are provided with a syringe, a petri-dish firmly attached to the base of the movable piston (plunger) of the syringe, a Set of weights, and other necessary apparatus.
(b)i. When a weight is placed on the petri-dish, which quantities of the gas in the syringe (\(\Omega\)) increases; (\(\beta\)) decrease?
ii. What is responsible for the pressure exerted by a gas in a closed vessel?
| S/N | M\(_{(g)}\) | V(cm\(^{3}\)) | V\(^{-1}\)(cm\(^{-3}\)) |
| 1 | 500 | 9.30 | 0.11 |
| 2 | 1000 | 7.40 | 0.14 |
| 3 | 1500 | 6.40 | 0.16 |
| 4 | 2000 | 5.40 | 0.19 |
| 5 | 2500 | 4.60 | 0.22 |
Slope, s = \(\frac{y_{2} - y_{1}}{x_{2} - x_{1}} = \frac{2425 - 725}{0.12 - 0.125}\)
\(\frac{1700}{0.086}\) = 20,000
Evaluation
S = 20,000
K = s\(^{-1}\)
= \(\frac{1}{20,000}\) = 5 x 10\(^{-5}\)
Precautions; i
- ensured that the retort stand and clamp are well tightened.
- avoided error due to parallel when taking my readings.
- made sure that the syringe is not on zero error.
(b)i. The quantities of the gas above the plunger increase
ii. While the quantities of the gas below the plunger decrease.
iii. Weight
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