Worksheet Key

Unit 3-6 worksheet pages 153-171                           NAME_________________________  Hr______

SHOW YOUR WORK AND Complete the following:

1. Convert the following to standard pressure and calculate the new volume.                              40 points

         A)  900 cm3 at 65.5 kPa                  B) 800 cm3  at 59.4 kPa

900 cm3 (65.5 kPa)= X (101.3 kPa)           800 cm3 (59.4 kPa)= X (101.3 kPa)

X= 581.9 cm3                                                           X=469.1 cm3  

2. Calculate the following volumes at standard temperature.

         A) 617 cm3 at 27 K                         B) 609 cm3 at 100 K

 617 cm3 =  X cm3                                                     609 cm3 =  X cm3

    27 K= 273 K                                          100 K= 273 K

X= 6238.6 cm3                                             X= 1662.57 cm3  

3. What is the new volume at 40 K, if the original volume was 50 cm3and the temperature was 80 K?

50cm3 =  X cm3          X= 25 cm3  

   80 K= 40 K

4. What is the pressure if a force of 50 N is applied over 400 m2?

50N/400m2 = 0.125 Pa

5. What is the force applied by an object covering 100 m2 with a pressure of 1000 kPa?

100 m2(1,000,000Pa)= 100,000,000 N

6. What are the volumes following volumes of gases as STP?

A)  4 moles of O2                                        B) 3 moles of H2O

4 moles(22.4L/mol)= 89.6 L                      3 moles(22.4L/mol)= 67.2 L

7. The following objects have what force pulling on them?

A) 10 kg                                                                  B) 1000 g

10 Kg(10 m/s2) = 100 N                 1000 g/1000 g/Kg=1 Kg     1 Kg(10 m/s2) = 10 N

C) 60 kg

60 Kg(10 m/s2) = 600 N

8. A) 6 Pa exerts what force on 3 m2?

6 Pa(3 m2)=18 N

B) 10 Pa is felt on what area as 20 N of force?

20 N  =  2 m2

10 Pa