1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.
2. If their phone camera doesn't automatically detect and decode QR codes, ask students to
4. Cut them out and place them around your class / school.
1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.
2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.
3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!
4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.
Question | Answer |
1. 5L of a gas is at 1.08 atm. What is obtained when the volume is 10L? | (1.08 atm)(5L)=(x)(10L) | 2. A gas is collected and found to fill 2.85L at 25ºC. What will be its volume at standard temperature? Standard temperature is 273K. | 2.61L | 3. 4.4L of a gas is collected at 50ºC. What will be its volume upon cooling to 25ºC? | 4.06L | 4. 5L of a gas is collected at 100K and then allowed to expand to 20L. What must the new temperature be in order to maintain the same pressure? | 127c | 5. Which state of matter has a definite volume but a variable shape? | Liquid | 6. In which state of matter can materials take the shape of their containers? | Liquid and Gas | 7. Increasing which variable would decrease the pressure of a contained gas? | Volume | 8. Boyle's law relates pressure and___? | Volume | 9. The phase change that is the reverse of vaporization is | Condensation | 10. If you take a helium balloon from inside a warm house to outside on a snowy day, what will happen to the balloon? | The balloon will shrink | 11. Using the kinetic theory, explain what causes gas pressure. | Gas pressure is caused be collisions of atoms with their containers | 12. What three factors affects the pressure of a gas in a closed contained? | Temperature, volume, and the number of particles. | 13. What happens to the speed of the particles inside an air-filled balloon if the temperature of the balloon increases? | The particles in the air move faster, on average, when the temperature increases because they have more kinetic energy. | 14. Using the kinetic theory, explain why the pressure of a gas increases when its temperature increases. | When the temperature of a gas increases, the particles have greater kinetic energy, on average, and more faster. | 15. How are the pressure and volume of a gas related? | The volume of a gas is inversely proportional to its pressure | 16. If I initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new volume of the gas? | 29.6L | 17. A gas takes up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1.5 atm, what is the new volume of the gas? | 30.5 L | 18. I have an unknown volume of gas at a pressure of 0.5 atm and a temperature of 325 K. If I raise the pressure to 1.2 atm, decrease the temperature to 320 K, and measure the final volume to be 48 liters, what was the initial volume of the gas? | 117 L |
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