## Chemistry: The Central Science (13th Edition)

As surface tension is directly correlated to IMFs, the order is: CH$_3$CH$_2$CH$_3$ < CH$_2$Cl$_2$ < CH$_3$CH$_2$OH
CH$_3$CH$_2$CH$_3$ is non polar, so it has the weakest IMFs. Ethanol can form hydrogen bonds, so it has stronger IMFs than does CH$_2$Cl$_2$.