BOYLE’S LAW
According to this law, for a given sample of a gas, the pressure is inversely proportional to its volume at constant Temperature. That is, if we increase the volume then the pressure decreases and vice-versa. This is obvious as on increasing volume the contact area increases and that’s why pressure decreases. The force remains the same as the temperature is constant.(BOYLE’S LAW).
P ά 1/V
PV = constant
P1V1
= P2V2 = P3V3
If the
pressure is doubled, the volume is halved. If the pressure is halved, the volume
is doubled.
The study of graphs plays a vital role in
understand these laws.
The P-V graph is called “rectangular hyperbola” as
it represents a standard curve which follows the equation xy = constant.
Straight lines are obtained
when the pressure is plotted against 1/V at constant temperature.
Example-5:
A 1.00 L sample of gas at 760 torr is compressed
to 0.800 L at constant temperature. Calculate the final pressure of the gas.
Sol. P1V1
= P2V2
(760) (1) = P2 (0.8)
