- Now consider the J-tube shown in Figure (1). If mercury is poured into this tube from its open end, a certain quantity of air is trapped in the closed tube.
Figure 1 Figure 2
- If we raise the open-end tube. the pressure on the trapped air increases by the amount made by the excess mercury in the open tube.
- Now if we plot a graphical relation between the 1/Vf on the vertical axis vs pf on the horizontal axis, we should get a straight line as that shown in Figure (2). Hence, Boyle’s law is verified.
