Why don't diamonds turn back to graphite once they reach Earth's surface?
A) Diamonds are too hard to undergo reactions.
B) Temperatures need to be lower than those found on Earth.
C) There is not enough heat on the surface of the earth to drive the reverse reactions.
D) Humans harvest diamonds before they can turn back to graphite.

Question

Quizplus · Accepted Answer

The reverse reaction that turns diamond into graphite requires a very high temperature and pressure, which are not present on the Earth's surface. The surface temperature of the Earth is not high enough to generate the reverse reaction that turns diamond back to graphite.

Why Don't Diamonds Turn Back to Graphite Once They Reach