The conversation between human and AI assistant.
Do the melting and freezing points have to be same for any substance?
That's interesting. Can you give me an example of a substance with different melting and freezing points?
Certainly, water is a good example of a substance with different melting and freezing points. The freezing point of pure water at standard pressure is 0 degrees Celsius, while the melting point is 100 degrees Celsius. This is because the freezing point is lowered by the presence of impurities, such as minerals and salts, which are more likely to be found in ice than in liquid water.