The graph below compares the volume occupied by 100 g of liquid water and 100 g of water vapor. (A bar graph is shown with the title, Volume Occupied. The y axis title is, Volume. The x axis title is, Substance. There are two markings on the x axis. One is marked X and the other is marked Y. The bar above X is far higher than the bar above Y.) Which statement best describes the two substances? Particles are farther apart in liquids so substance Y is liquid water. Particles are closer together in liquids so substance X is liquid water. Particles are closer together in gases so substance Y is water vapor. Particles are farther apart in gases so substance X is water vapor.

Answer: Particles are farther apart in gases so substance X is water vapor.

Explanation:

Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another and thus have higher kinetic energy as compared to solids. This state has a definite volume but does not have a fixed shape. They occupy lesser volume than gases. Example: Liquid water

Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. They have highest kinetic energy. This state has indefinite volume as well as shape. They occupy the most volume. Example: Water vapor

As it is given that substance X has higher volume as compared to substance Y, thus we can conclude that substance X represents water vapor and substance Y represents water.

Particles are farther apart in gases so substance X is water vapor.