If coal has more energy per gram than nitroglycerin, why isn't its combustion considered an explosion?
A)Its lower explosion level (LEL) is too low for it to be considered a true explosion.
B)It requires too high an ignition temperature.
C)The rate is too slow.
D)The concentration is never high enough for an explosion.

Question

Quizplus · Accepted Answer

The rate at which coal combusts is significantly slower than that of nitroglycerin, which is why its combustion is not considered an explosion. Explosions require a rapid release of energy, and while coal may contain a high amount of energy per gram, it releases this energy slowly when it burns.

If Coal Has More Energy Per Gram Than Nitroglycerin, Why