A certain mass of a gas occupies a volume of \(2.5\ \text{dm}^3\) at NTP. Calculate the change in volume of gas at the same temperature if pressure of gas is changed to \(1.25\ \text{atm}\).
Show Hint
For Boyle's law:
\[
P \propto \frac{1}{V}
\]
This means:
• Increase in pressure causes decrease in volume.
• Decrease in pressure causes increase in volume.
Always remember:
\[
P_1V_1 = P_2V_2
\]
Temperature must remain constant for Boyle's law to be applicable.