
Beginner's
Guide to Propulsion
Charles and GayLussac's Law
Answers
 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.
 If T = 1000 K,
and V = 10 cu. m., what does C equal?
C = .01
 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

 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.
 Open the animated
version of Charles and GayLussac'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.
 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

 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.
 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.
