1. Chem Catalyst Convert the following to K Convert the following to °C
Solve the following:
A sample of gas has a volume of 120L at a temperature of 40°C. The temperature drops to 10°C. If nothing else changes, what is the new volume of the gas?

2. Chem Catalyst ANSWERS Convert the following to K
52°C = 325K
-123°C = 150K
Convert the following to °C
460 K = 187°C
56 K = -217°C
Solve the following:
A sample of gas has a volume of 120L at a temperature of 40°C. The temperature drops to 10°C. If nothing else changes, what is the new volume of the gas? = 108.5L

3. Boyle’s Law Lab

4. How does gas volume affect gas pressure?
Key Question today:
How does gas volume affect gas pressure?

5. Your Task At lab stations, follow the directions perfectly!
For printing – print to C152, NOT C114!!!
Retrieve your graph when finished
Answer analysis questions
Questions are on the projector stand
Answer them on your GRAPH or in your notebook
DO NOT write on my worksheets PLEASE!!
These are HW if you do not complete them in class.
To print = go to start menu, select “printers and faxes”, select “add a printer”, click next until you get to the screen in which you can “find now”, search for the printer for C152 and then print
Put your names on the bottom, print out 1 for everyone in your group

6. Boyle’s Gas Law Lab Analysis Responses
Answer to question 2?
Answer to question 3?
Answer to question 4?
Relationship between pressure & volume?
Answer to question 7?
Answer to question 8?

7. Boyle’s Law P1V1 = P2V2 Relationship between pressure and volume
When temperature is held constant
As pressure increases = volume decreases
Indirect relationship!!
P1V1 = P2V2

8. Standard Conditions (STP)
Standard temperature
0⁰C
273 K
Standard pressure
1 atm
760 mmHg
760 torr
101.3 kPa
Pressure conversions:
1 atm = 760 torr
1 atm = 760 mmHg
1 atm = kPa

9. Analysis (cont.)
Create the following table on your graph and calculate the last 2 columns
Volume (mL)
Pressure (kPa)
P/V = k
PV = k 4
250 6
200 9
130 13 90 15 70
17.5 20 60

10. Analysis (CHECK YOUR ANSWERS)
Create the following table on your graph and calculate the last 2 columns
Volume (mL)
Pressure (kPa)
P/V = k
PV = k
4.5
250
55.6
1125
5.5
200
33.3
1100 9
130
14.4
1170 13 90
6.9 15 70
4.67
1050 17 4
1190
19.5 60 3

11. Analysis (cont.)
What is Boyle’s Law? (mathematical equation)

12. Boyle’s Law Practice