Pressure, volume and temperature of a gas
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
A 1.5 L balloon at 20 °C is warmed to 60 °C at constant pressure. What is its new volume, to 0.01 L, Esme?
A 4 L balloon at 30 °C is moved to a 10 °C room at constant pressure. What is its new volume, to 0.01 L, Jun?
A sealed syringe holds 40 mL of air at 1 atm. The plunger is pushed to 20 mL at the same temperature. What is the pressure, Kira?
- 0.5 atm
- 2 atm
- 1 atm, since the air is sealed
A pump's sealed cylinder holds 0.60 L of air at 100 kPa. Squeezed to 0.20 L at the same temperature, what is the pressure, Luz?
- 33.3 kPa
- 100 kPa, as no air escapes
- 300 kPa
Why does a sealed syringe get harder to push as the plunger goes in, Milo?
- The pressure falls as the volume falls, so it sticks
- The air's temperature drops when squeezed
- Smaller volume means higher pressure pushing back
A balloon from a cool room is left in a warm car. Why does it get bigger, Pia?
- Warmer gas takes up more space at the same pressure
- The car's air leaks into the balloon
- Warmer gas takes up less space, so the rubber stretches
A 1.5 L balloon at 250 K warms to 300 K at constant pressure. What is its new volume, Ren?
- 1.25 L
- 1.5 L, as nothing escapes
- 1.8 L
A car tire's air is at 300 K and 330 kPa (absolute). On a hot day it reaches 330 K. What is the new pressure, Tala?
- 363 kPa
- 300 kPa
- 330 kPa, as the tire is sealed
Why do drivers check tire pressure before a long drive on a hot day, Zee?
- Heat lowers the pressure, so the tire goes soft
- Heat lets air leak out through the rubber
- Warmer air in the fixed tire volume raises the pressure
A sealed glass jar of air warms in the sun from 280 K to 350 K. By what factor does its pressure change, Ari?
- 1.25 times higher
- Unchanged, since the jar is sealed
- 0.8 times, so lower