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

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.