Name __________________________________________ Period ___________________ Date _________________
Unit 2 Worksheet #4: PVTn Diagrams
For each of the problems, draw a particle diagram that clearly shows what is happening to the particles at the
starting conditions and ending conditions. Include ARROWS in your drawing.
Write in what happens to the pressure, volume, temperature, and number of particles in each system. (increases,
decreases, or stays the same)
Example:
You blow up a balloon and tie it off. Then you put the balloon in the refrigerator.
Particles at the start
Particles at the end
Pressure: ____decrease____
Volume: ____decrease____
Temperature: ____decrease____
number of particles: ____stays the same____
----------------------------------------------------------------------------------------------------------------------------------1. A green liquid in a flask has a volume of 150 mL at 25°C. The liquid is heated to 50°C.
Particles at 25°C
Particles at 50°C
Pressure: _____________________________
Volume: _____________________________
Temperature: _________________________
number of particles: ____stays the same____
2. It is 20°C outside, and you fill your bicycle tires until the air pressure is 90psi. Overnight, the temperature
drops to 5°C.
Particles at 20°C
Particles at 5°C
Pressure: _____________________________
Volume: __________stays the same______
Temperature: _________________________
number of particles: ___stays the same_____
3. You have a closed container of gas that is 250mL. You compress the container to a volume of 150mL.
Particles at 250 mL
Particles at 150 mL
Pressure: _____________________________
Volume: _____________________________
Temperature: _________________________
number of particles: ____stays the same____
4. You have a basketball filled with air. The ball gets a hole and air starts leaking out.
Particles before leak
Particles after leak
Pressure: _____________________________
Volume: _____________________________
Temperature: ______stays the same________
number of particles: ____________________
5. You have a closed flask of air. You blow in 3 more breaths of air.
Particles before breaths
Particles after breaths
Pressure: _____________________________
Volume:________stays the same________
Temperature: _________________________
number of particles: ____________________
6. A 15 mL sample of air is in a syringe. You hold the syringe shut and pull the stopper out to 20 mL.
Particles at 15mL
Particles at 20mL
Pressure: _____________________________
Volume: _____________________________
Temperature: _________________________
number of particles: ____stays the same____