37Physical Foundation of Interior Ballistics
1. Determine the maximum heat given off.
Answer: Q = −20.02 [kJ].
2. Compare the result in (1) with the example problem in this chapter.
Answer: This situation removes 6.09 kJ more energy than the example.
Problem 8
A really interesting person takes the tennis ball mortar we built in problem 3 and modi-
es it—squirting in and igniting 0.003 oz. of acetylene gas (C
2
H
2
(g)). If we assume the
combustion kinetics are fast enough such that the energy release occurs before the ball
can move, we want to determine the muzzle velocity of the tennis ball. Proceed along the
following steps:
a. Balance the stoichiometric reaction equation for acetylene.
b. Balance the actual equation neglecting the volume the ...