As a liquid is heated, the average kinetic energy of its particles increases. The rate of evaporation increases as more and more molecules are able to escape the liquid’s surface into the vapor phase. Eventually a point is reached when the molecules all throughout the liquid have enough kinetic energy to vaporize . At this point the liquid begins to boil. The boiling point is the temperature at which the vapor pressure of a liquid is equal to the external pressure. The Figure below illustrates the boiling of liquid.
A new liquid is found with a boiling point of 50 degrees C. John poured some of this liquid in a pot and began heating it to 60 degrees. Eventually all of the liquid vaporizes
Based on the above, answer the following question:
Given the new liquid is already in vapor form, will cooling the vapor below 50 degrees cause it to evaporate or return it to a liquid state?