4
QuizMultiple Choice

Freshwater vs Saltwater Properties — Quiz

Question 4 • Earth and Space Science

Which best explains why desalination plants must account for both density and boiling point when treating seawater?

Answer
A
Seawater density is higher, requiring less energy to pump and treat.
B
Seawater density is lower, so it evaporates more quickly.
C
The lower boiling point of seawater reduces energy costs.
D
The higher boiling point of seawater means more energy is needed for distillation.

Explanation

Dissolved salts make seawater denser than fresh water and raise its boiling point slightly. In distillation, water must be heated until it evaporates, so the higher boiling point means more energy is needed. Therefore, the best choice is “The higher boiling point of seawater means more energy is needed for distillation.”

AI-written and checked against the verified answer.

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