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JAMB Chemistry 1989 Question 29

Question 29

Kinetic Theory and States of Matter

The graph shows a typical heating curve from the solid phase through the liquid phase to the gaseous phase of a substance. Which part of the curve shows solid and liquid in equilibrium?

Diagram for this question
  1. A.T
  2. B.U
  3. C.X
  4. D.Y
Show the answer and explanation

Answer: A (T)

Explanation

While a solid melts, its temperature stays constant, giving the first flat part of the curve (T). There, solid and liquid exist together.