Question

If two open vessels, one containing normal propanol and the other containing water, both at the same temps, are placed side by side and if the alcohol and the water each have the same surface area, it is reasonable to believe that the volume of normal propanol will diminish at the same rate as the water. a. true b. probably true but need more info c. impossible to judge d. probably false, need more data e. false thanks

Answer 1

Propanol will evaporate relatively faster than water under same conditions. This is bcoz water molecules easily forms hydrogen bonds, with one another, which creats a strong attraction between its molecules. Whereas, in case of propanol the carbon atoms in its molecules are unable to form such strong attraction between its molecules. This lack of strong attraction enables them to evaporate fast, while strong internal attraction present in water resists it for evaporation.