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Which of the gas laws does this graph illustrate?
A. Boyle
B. Charles
C. Gay-Lussac
D. Graham
QUICK ANSWER…
B
DETAILS…
Charles law is a gas law that relates temperature and volume. The graph shows a relation between volume and temperature starting from origin 0. This is in agreement with Charles law which states thus:
V1/T1 = V2/T2
Or V/T = K
Where K = constant = slope of the graph.
Now for the right answer to the above question:
- Option A is incorrect. Boyles law relates pressure and volume. (P1V1 = P2V2)
- Option B is correct.
- C is incorrect. Gay-Lussac’s law relates pressure and temperature at constant volume. (P1/T1 = P2/T2)
- D is not the correct answer. Graham’s law has to do with rate of diffusion.
KEY-POINTS…
You may please note these/this:
- Charles law states that the VOLUME of a given fixed quantity of gas is directly proportional to its temperature when the pressure is kept constant.
- Charles law implies that the higher the temperature of a fixed mass of gas, the higher its volume.
- Gay-Lussac’s law states that the pressure of a fixed mass of gas is directly proportional to its absolute temperature when the volume is kept constant.
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/ culled from 2020 JAMB-UTME chemistry past question 7 /
