The comparison between water and acetic acid which are both polar compounds is that; "more heat energy is required to vaporize a gram of water than to vaporize a gram of acetic acid."
The term polar compounds refers to those compounds that possess a dipole moment hence they have a positive end and a negative end. These compounds have a high melting point and boiling point.
Based on the graph, the comparison between water and acetic acid which are both polar compounds is that; "more heat energy is required to vaporize a gram of water than to vaporize a gram of acetic acid and more heat energy is required to melt a gram of acetic acid than to melt a gram of water."
Learn more about polar compounds: https://brainly.com/question/1303996