2 Answers

The process whereby a liquid turns spontaneously into vapor…

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PHYSICS

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The process whereby a liquid turns spontaneously into vapor is called

A. regelation

B. evaporation.

C. boiling.

D. sublimation

QUICK ANSWER…

C

EXPLANATION…

Please observe closely the difference between evaporation and boiling. While evaporation is the slow conversion of a liquid to vapour mostly at temperatures below boiling point, boiling on the other hand is the vigorous or spontaneous conversion of liquids to bubbles and vapors at boiling point. This boiling point is the temperature at which vapour pressure equals atmospheric pressure.

In this question, the term ‘spontaneous’ makes the difference, as evaporation is generally slow and not vigorous.

Now for the right answer to the above question:

  1. Option A is incorrect. regelation has to do with refreezing of ice immediately after it was melted under pressure, it is unrelated to this question.
  2. Option B is incorrect. evaporation is the slow (not spontaneous) change of a liquid into vapor or gas.
  3. C is correct. boiling is spontaneous evaporation.
  4. D is not the correct answer. Sublimation has to do with direct change of state of a solid to gas.

HELPFUL TIPS…

You may please note these/this:

RELATED!  During the transformation of matter from solid to...
  • Evaporation is a slower process that can occur at any temperature lower than the boiling point.
  • At boiling point, vigorous vaporization takes over.

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/ culled from 2018 JAMB-UTME physics question 31 /

The process whereby a liquid turns spontaneously into vapor... » QuizTablet
The process whereby a liquid turns spontaneously into vapor... » QuizTablet

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