Question 26
Change of State and VapoursThe correct cooling curve for a molten substance such as naphthalene is represented by
- A.Graph A
- B.Graph B
- C.Graph C
- D.Graph D
Show the answer and explanation
Answer: D (Graph D)
Explanation
The liquid cools, then the temperature stays constant while it solidifies (latent heat is given out), then the solid cools. Graph D shows the flat part.