Pressure, volume and temperature of a gas

Answer Key - Grade 10 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   A bike pump's sealed cylinder holds 6 L of air at 1 atm. It is squeezed until the pressure is 2 atm, at the same temperature. What is the new volume, Ari?

   3 L
2. 2.

   A balloon holds 5 L of air at 1.5 atm. It rises to where the pressure is 0.75 atm, at the same temperature. What is the new volume, Kira?

   10 L
3. 3.

   Which law links pressure and volume when temperature stays fixed, Jun?

   • Charles's law
   • Boyle's law
   • Gay-Lussac's law
4. 4.

   Which law links volume and temperature when pressure stays fixed, Luz?

   • Gay-Lussac's law
   • Charles's law
   • Boyle's law
5. 5.

   By Boyle's law, if the pressure on a sealed gas doubles at the same temperature, what happens to its volume, Noah?

   • It halves
   • It doubles
   • It stays the same
6. 6.

   By Charles's law, if a gas's kelvin temperature doubles at constant pressure, what happens to its volume, Pia?

   • It doubles
   • It halves
   • It stays the same
7. 7.

   By Gay-Lussac's law, if a sealed, rigid gas's kelvin temperature doubles, what happens to its pressure, Ren?

   • It rises by exactly 2 atm
   • It doubles
   • It halves
8. 8.

   Why must the gas laws use kelvins, Tala?

   • Kelvins make the gas cooler
   • Celsius numbers are too small to divide
   • Volume and pressure are proportional to kelvin temperature
9. 9.

   A balloon goes from 10 °C to 20 °C at constant pressure. Does its volume double, Zee?

   • Yes, as long as the pressure stays the same
   • Yes: the temperature in °C doubled
   • No: 283.15 K to 293.15 K is about 3.5% more
10. 10.

    What is 12 °C in kelvins, Esme?

    • 285.15 K
    • 261.15 K, from 273.15 − 12
    • 12 K, the same number