Question

Which of the following appropriately describes H2O(g)?

(A) The sample has an indefinite shape but a definite volume.
(B) Particles in the sample are ordered in a rigid, geometric pattern.
(C) The molecules are compressible, meaning the volume is indefinite.
(D) Particles in the sample have a definite shape but an indefinite volume.

Answer 1

H2O(g) is described as having a definite shape but an indefinite volume.

Step-by-step explanation:

The appropriate description for H2O(g) is option (D) - The particles in the sample have a definite shape but an indefinite volume.

In the gaseous state, the particles of H2O(g) have enough energy to overcome intermolecular interactions and move freely. However, because the gas particles are not confined to a particular volume, they can expand and fill the container in which they are held, giving them an indefinite volume.

Unlike solids and liquids, gases do not have a definite shape. Instead, they take the shape of their container, which means their particles do not have a rigid geometric pattern (option B is incorrect). Additionally, gases are compressible, meaning their volume can be changed by applying pressure (option C is incorrect). Lastly, gases do not have an indefinite shape but a definite volume (option A is incorrect).