11th Class Chemistry States of Matter Question Bank 11th CBSE Chemistry States of Matter

  • question_answer If alcohol evaporates on your palm, it becomes cold. Why?

    Answer:

                    Certain molecules of alcohol acquire kinetic energy greater than the escape energy as a result of collisions. They, therefore, escape as vapours. Since the kinetic energy of the rest of the molecules decreases, their temperature gets lowered. As a result, the palm becomes cold.


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