Beginner's Guide to Propulsion
Charles and Gay-Lussac's Law
Answers

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1. Volume is directly proportional to the temperature means......
   Student should recognize that if either V or T increases, the other will also, and vice versa.
   
   
2. If T = 1000 K, and V = 10 cu. m., what does C equal?
   C = .01
   
   
3. Using that value for C, find:
   a. V, when T = 1,1000 K
   b. V, when T = 1200 K
   c. V, when T = 800 K
   d. V, when T = 1,400 K

   
   

   a) V = 11 cu. meters

   b) V = 12 cu. meters

   c) V = 8 cu. meters

   d) V = 14 cu. meters

    

4. Plot these points on a graph, or use a graphing calculator. Describe the graph.
   The graph should have a positive slope. Student should also describe how he/she has labeled the axes.
   
   
5. Open the animated version of Charles and Gay-Lussac's Law slide. How does your graph compare to the graph shown here?
   The graphs should both have positive slopes. Steepness will depend on scale.
   
   
6. Use your graph to find:
   a. V, when T = 2,000 K
   b. V, when T = 600 K
   c. T, when V = 15 cu. m.
   d. T, when V = 3 cu. m.
   

   a) V should be about 20 cu. meters	c) T should be about 1500 K
   b) V should be about 6 cu. meters	d) T should be about 300 K

   
   

7. Now check your answers for problems 3 and 6 by using the ratio V/T = C. Were they the same?
   Answers should be very close, as this is just a different version of V = CT.
   
   
8. Take a look at your answer to question 1. Does your graph agree with that answer? Why or why not?
   Answers will be different for each student.