Question:
When air is pumped into a cycle tyre the volume and pressure of the air in the tyre both are increased. What about Boyle’s law in this case?
Solution:
PV = P(m/ρ) = constant
P/ ρ = constant
Volume = m/ ρ where m is constant
Therefore, when the air is pumped into the tyre of the cycle, the mass of air increases as the no.of molecules increases. Therefore, Boyle’s law is only applicable when
the mass of the gas remains fixed.