Our materials professor likes to do Kahoot quizzes and I am confused about why the following statement is true:
A defect in a crystal gives it higher energy.
I know that an imperfect crystal has a higher internal energy than a perfect one, in which case the statement would make sense. However, the lecture only introduced the concept of Gibbs energy so I am assuming the statement is referring to that one.
$$G = H - TS$$
Since a crystal with a defect has a higher entropy than a perfect one I am wondering what the net effect on $G$ is.