When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?
In order to determine which of the following properties remains the same in both the liquid and the vapor state of boiling water, we need to consider the properties that are known to be independent of the state of matters such as temperature, pressure, or composition.
There are three options to consider:
1. Mass
2. Chemical composition
3. Density
Let's evaluate each option:
1. Mass: The mass of a substance remains the same regardless of the state. So, the mass of boiling water remains constant when it turns into steam.
2. Chemical composition: The chemical composition of a substance does not change when it undergoes a change in state. In the case of boiling water, H2O remains H2O whether it is in liquid or vapor form.
3. Density: Density is a measure of how tightly packed the molecules are. In the vapor state, the molecules are more spread out compared to the liquid state. Therefore, the density of boiling water is not the same in liquid and vapor.
Hence, the correct answer is that the chemical composition of the water (H2O) remains the same in both the liquid and vapor states.