Question

I don't really understand this...Can someone please explain? The data is included, I just need to know how to solve.

From Part 2 of the lab activity, plot a graph of volume vs. temperature (in kelvins) with the two data points that resulted from your experiment. Draw a straight line connecting the two points, thus assuming a linear relationship between volume and temperature.
The x-intercept corresponds to where the volume would be zero and the temperature can be no lower, defined as absolute zero. Absolute zero is 0 K. Compare your results to those expected. How close to absolute zero was your intercept? Why might your value be different from absolute zero?

Answer 1

Here is my data:
Part 2
balloon before: 15 cm, C=52.25pie balloon
after: 14 cm, C=49pie
room: 19.4 Cº
292.4 K
water: 5 Cº
278 K

Answer 2

Can you explain part 2 and your data more? What measurement are you stating there(15, 14 cm)?

Answer 3

I really just need help on the graphing part, how to find the volume with what I have...I blew up the balloon, put it in a container with water for 4:00 min. and had to measure the changes in the balloon. If it shrunk or grew bigger...

Answer 4

For Part 2 we did ice water so it shrunk, of course.

Answer 5

Ok so what are the 14 and 15 cms? Is that the diameter?

Answer 6

Yes, that was what we were told to measure, but I'm not sure how that helps find the volume...

Answer 7

Ah well then you just use the formula \[V=\pi r ^{3}\] for volume of spheres.

Answer 8

These were my instructions:
1. When you have finished the tutorial, click the home button and reset the lab if necessary.
2. Pick up the red balloon, and use the air pump to inflate the balloon to a diameter of at least 7.00 cm.
3. Remove the balloon from the pump, and use the caliper to measure its diameter. Record this measurement to the nearest hundredth of a centimeter in the data table. Also record room temperature. Note that you now know two important characteristics about the gas in the balloon: volume (by calculation) and temperature.
4. Remove the top of the hot water container, and measure the temperature of the water. Record the temperature in the data table.
5. Place the balloon in the container, put the top back onto the container, and click the stopwatch to begin the 4.00-minute countdown. As the countdown occurs, calculate and record the volume of the balloon.
6. After the stopwatch reads 0.00 s, remove the top and the balloon from the container. Measure and record the diameter of the balloon to the nearest hundredth of a centimeter.

Answer 9

Oh, ok, so I just use that? And I'm good?

Answer 10

So I just plot the volume for before which is: 1324.6875 and after: 1077.02 And the temp from before and after, but do I do the temp of the room or the water?

Answer 11

That's not what I got for the volumes.
Before: V=pi * 15^3
After: V=pi * 14^3

Answer 12

Well 15cm and 14cm are the diameter so don't I have to divide the measurements by half to get the radius?

Answer 13

Ohhh yes. Then you are right.

Then you just plot

Answer 14

Ok, but do I use the temperature of the water or the room temperature?

Answer 15

I mean plot http://sketchtoy.com/58488019

Both. You will use the surrounding temperature of the balloon. When it is in air, you will use the room temperature. When it is in water, it will be the temperature of the water.

Answer 16

Oh, so I use the room temperature paired with the volume from before and the water temperature paired with the volume from afterwards?

Answer 17

Thank you so much! I feel so much better now!

Answer 18

Yeppers. You're very welcome. Are you new to this site?