Boyle's Law (Pressure & Volume)
If pressure doubles, what happens to volume (at constant T)?
Volume is halved.
If temperature increases, what happens to volume (at constant P)?
Volume increases.
If temperature doubles, what happens to pressure (at constant V)?
Pressure doubles.
Write the Combined Gas Law equation.
T1P1V1=T2P2V2
Why does a sealed chip bag look inflated on an airplane?
Air pressure outside is lower, so the bag expands.
A balloon has a volume of 2.0 L at 1.0 atm. What is the volume at 2.0 atm?
1.0 L.
A balloon is 1.50 L at 300 K. What is the volume at 600 K?
3.00 L.
A container has a pressure of 1.00 atm at 300 K. What is the pressure at 600 K?
2.00 atm.
A gas at 1.00 atm, 2.00 L, and 300 K is changed to 2.00 atm and 600 K. What is the new volume?
2.00 L.
Why do car tires look underinflated on a cold morning?
Lower temperature → lower pressure.
Explain why deep-sea divers must exhale while rising to the surface.Talk about pressure and volume.
Rising decreases pressure, volume of air in lungs expands — risk of lung damage if not exhaled.
Why should car tires not be overinflated on a hot day?
Heat raises temperature, which increases volume/pressure — risk of bursting.
Why does an aerosol can explode if thrown into a fire?
Temperature increases → pressure rises until the can bursts.
A balloon is 3.00 L at 0.800 atm and 250 K. What is its volume at 1.20 atm and 300 K?
2.50 L.
Why must scuba divers ascend slowly according to Boyle’s Law?
Pressure decreases too quickly → gas expands, causing decompression sickness.
A gas at 3.0 L and 4.0 atm expands to 6.0 L. What is the new pressure?
2.0 atm.
A balloon has volume 2.00 L at 273 K. What is the volume at 310 K?
2.27 L.
A gas at 2.0 atm and 250 K is heated to 500 K. What is the new pressure?
4.0 atm.
A gas at 5.0 L, 1.50 atm, and 298 K is compressed to 3.0 L and 350 K. Find the new pressure.
2.10 atm.
Why does a basketball bounce better after being left in the sun?
Higher temperature increases pressure.
A syringe contains 50.0 mL of gas at 0.950 atm. If pressure increases to 1.20 atm, what is the new volume?
39.6 mL.
A hot air balloon holds 1000 L at 27 °C. If it rises and cools to 7 °C, what is the new volume? (Use Kelvin.)
933 L.
A gas is 0.850 atm at 20 °C. What is the pressure at 100 °C? (Convert to K.)
1.08 atm.
A weather balloon is 120 L at 1.00 atm and 293 K. At high altitude, P = 0.500 atm and T = 253 K. What is the new volume?
139 L.
A helium balloon filled at 20 °C shrinks outside at 0 °C. Why?
Lower temperature → lower volume.