ch11 rev gas laws m

Review for mchem gas laws/demonstrations test

Explain these demonstrations:

Card holds water in bottle

orange suction cups

Karate

Egg in the bottle

Can crusher

What is room temperature in Celsius? Kelvin?

What is the freezing point of water in Celsius? Kelvin?

What is the boiling point of water in Celsius? Kelvin?

All sketches can be made on the back.

1. Sketch A sealed syringe half full of air at room temperature.

2. Sketch what the same syringe would look like if placed in a beaker of ice water.

3. Sketch what the same syringe would look like if placed in a beaker of boiling water.

4. When temperature decreases, volume __________ when ___________ doesn’t change. This is a __________ proportion.

Sketch a sealed syringe, filled with 60mL of air at 1 atm of pressure.

Sketch what the same syringe would look like if 2atm of pressure was placed on it.

Sketch what the same syringe would look like if 4atm of pressure was placed on it.

When pressure increases, volume __________ when ___________ doesn’t change. This is a __________ proportion.

Sketch the spray can thought experiment. When temperature increases ______________ increases, when _________ is held constant. This is a _____________ proportion.

Sketch and label the first instrument used to measure air pressure.

Sketch the Cartesian diver floating and sunk. Be sure to include the water levels inside the test tube. Explain why it sinks when squeezed, and why it floats upon release.

mchem review problems:

50 mL of gas at 1atm is compressed to 2.8atm. What is the new volume?

A spray can at 2 atm is heated from 23 degrees C to 100 degrees C. What is the new pressure?

18L of gas at 23degrees C is heated to 90 degrees C. What is the new volume?