Name ______
Partner:______
Gas Activities Lab
#1 Cartesian Diver
A. What is the property that tells us whether something will sink or float? What is its formula?
B. observations: (especially note what is happening inside the dropper.
Do not just say that the dropper goes up and down!)
C. On-line, look up Cartesian Diver. From whom did it get its name?
D. Give two gas properties that apply. ______and ______
#2 Imploding Soda Can
A Definition of boiling point:
B. What two things must be equal in order to have boiling?
C. okay….knowing this, why does the can implode (get crushed) when it is inverted into the cold water? (this should be a fairly lengthy answer and should incorporate the above answer)
D. Give two gas properties that apply. ______and ______
# 3 Balloon in an Erlenmeyer
A Were you able to blow up the balloon? ______
B If yes, go see me for your reward.
C If no, explain why.
D Give two gas properties that apply. ______and ______
#4 Balloon Mass
A mass of deflated balloon: ______grams
B mass of inflated balloon: ______grams
= grams of CO2
C Assuming everything in the balloon is CO2, how many liters of CO2 gas were you able to blow into the balloon? (lab conditions are at STP).Use fence-post, sig digs, and units.
D Give two gas properties that apply. ______and ______
#5 Exploding Cans
Many ordinary products that you use in you home contain a pressurized gas. These products range from hair spray and shaving cream to oven cleaner and spray paint, but they all work in the same way.
The gas is lighter than the liquid and occupies the upper part of the container. The gas exerts pressure on the top of the liquid and on the sides of the can. When you press the push-button to open the valve, the gas pressure forces the liquid up the tube and out through the nozzle. This happens so quickly that the liquid turns into a mist.
Pressurized cans are labeled with warnings to keep them away from heat and to avoid incinerating them when empty. Heating the containers may cause them to explode
A Draw the molecules of gas in this can of hair spray remembering that they are lighter than the liquid.
B Use arrows to show the direction of force these gas molecules exert inside the can.
C When you press the push-button, a valve opens and liquid leaves the can through the tube. How does the gas enable this to happen?
______
D Is the can truly empty when no more hairspray is released? Explain
______
E Why don’t we heat pressurized cans? ______
#6 Skinny/Fat balloon
A. Why are you able to remove the balloon from the beaker once it is placed in ice water?
B. What happens when you take the balloon out of the beaker?
#7 Drinking Straws
A What is happening when you drink using a straw? In other words
what needs to be created to make the straw work?
B So….when you use the two straws, what did or did not happen? (answer should be more than “… juice was not able to be sucked up.” I want to know why.)