Evaporation of water is an example of _.
Correct answer: A. Endothermic reaction
- A. Endothermic reaction
- B. Exothermic reaction
- C. Chemical reaction
- D. None of the above
Explanation
Evaporation does not involve the conversion of one chemical species to another (the chemical species is water throughout). Hence this is not a chemical reaction. Evaporation required external energy to break the intermolecular forces of attraction between liquid water molecules, hence it is endothermic.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
Practise Liquids
350 free Liquids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Evaporation, Boiling Point and Vapour Pressure questions
On which factors the vapour pressure of a substance does not depend?
Vapor pressure is independent of which factor?
Which of tho following molecules will showe higher rate of evaporation?
Vapor pressure is measured by calculating difference in liquid pressure and _.
Which of the following has the lowest vapor pressure?
Evaporation is the reverse of _?