Chapter 9 & 11 Test
                                

Fill in the following table below:

4.   (4 pts)  From chapter nine we know that all objects are made of particles, that these
     particles like to stick together, and that temperature affects the speed of these particles. 
     According to these principles explain why heating a solid may cause it to melt.
                                

5.   (5 pts) A balloon has a volume of 3.0 L at a pressure of 101 kPa and 21.0C.  What
     would the new volume of the balloon be if it were moved to a pressure of 155 kPa at 51C?
                                

6.   (5 pts) How many moles of gas are contained in a 20.0 L scuba tank at a pressure of 550
      atm and a temperature of 21C?
                                

7.   (5 pts) A student makes a hollow clay turtle in Mr. Opstad's ceramics class but fails to
     follow directions and does not leave an air vent in the turtle.  The pressure in the turtle is
     1.05 atm at 21C.  Assuming that the turtle does not explode in the kiln destroying all the
     other students' works, what will be the pressure in the turtle if it is baked in the kiln at a
     temperature of 1000.0C?
                                

8.   (5 pts) How many grams of Neon would it take to fill up a .50 L light bulb to a pressure of
      51 kPa at a temperature of 273 K?
                                

9.   (5 pts)  N2 leaks out of a balloon at a rate of .100 moles every minute.  How fast would
     He leak out of the same balloon under identical conditions?
                                

10.  (3 pts)  If you have a small leak in your car tire, would your tire go flat faster if it were
     filled with N2 or O2?  Explain.
     

11.  (4 pts) Describe in terms of particles and collisions why increasing the
     volume of the cylinder shown at right will lower the pressure of the gas in
     the cylinder.

12.  (4 pts) Explain in terms of the differences between ideal and real gases
     why real gases will behave like ideal gases at high temperatures.

13.  (5 pts) Water can be separated into hydrogen and oxygen according to the
     following equation:

                    H2O(l) -->   2 H2(g) + O2(g)

     If 10.0 g of H2O are placed into an empty, air-tight, 5.0 L container and all of the water is
     separated into hydrogen and oxygen, what will be the pressure in the tank if the temperature is 20.0øC?

14.  (3 pts) If you could be any age from now until the rest of your life, what age would it be
     and why?

Selected Answers

1. no, yes

2. no, no

3. yes, no

5. 2.2 L

6. 450 moles

7. 4.55 atm or 460 kPa

8. .23 g Ne

9. .265 mol/min

13. 410 kPa