**Materials**

empty soda can

Bunsen burner

metal tongs

water

pan

**Procedure**

- Fill a pan with water to about ½ inch from the top.
- Measure the diameter and height of the can. Use this to calculate the surface area and volume.
- Read the room pressure from the barometer in the back of the room.
- Determine the mass of the dry soda can.
- Fill the can to the tippity toppity and determine the mass of the can full of water.
- Empty all but a few drops of the water from the can. Grip it gently in the tongs with your palm up and heat it over a Bunsen burner. Move it around slightly so it doesn’t burn through.
- Observe the clouds coming out of the top. When the cloud disappears, quickly flip the can so the top goes flatly into the water. Observe. Repeat.

2. diameter of can __________ in.

height of can __________ in.

surface
area of can (from d & h)
__________ in.^{2}

volume
of can (from d & h)
__________ in.^{3}

3. pressure of room __________ mmHg

pressure
in room
__________ lb/in.^{2}

4. mass of empty can
__________ g

mass
of can full of water
__________ g

a. Calculate the total force on
the outside of the can, in pounds.

(this
is the force that crushed the can!)

b. What was the cloud coming out
of the top of the can?

c. Why won’t reheating the can
cause it to re-inflate?

d. Mass of water in can
__________ g

e. Volume of can (from water, in
“d”) __________ mL

f. Volume of can in in^{3}
__________ in^{3}

(1 in. = 25.4
mm; 1 mL = 1 mm^{3})

g. Assume the volume you calculated
in “f.” is the “correct” volume.

Calculate
the percent error in the volume you calculated in #2?