When a teapot boils, we see a white cloud rising from the spout. The white cloud is composed of:
A. water in the liquid phase
B. water in the gaseous phase
c. water molecules coming apart to from H+ and OH- ions
D. H+ and OH- ions coming together to form water molecules.
Explain!
B
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To determine the composition of the white cloud rising from the spout of a boiling teapot, we need to understand the process of boiling. When water is heated enough, it undergoes a phase change from a liquid to a gas. This phase change is known as vaporization.
Option A suggests that the white cloud consists of water in the liquid phase. However, since boiling is a process of water transitioning from liquid to gas, it is not likely that the cloud is composed of liquid water. So, we can eliminate option A.
Option B suggests that the white cloud is composed of water in the gaseous phase. This option aligns with our understanding of boiling, as it is during boiling that water molecules gain enough energy to overcome intermolecular forces and transition into the gas phase. Therefore, it is likely that option B is the correct answer.
Options C and D involve the formation and dissociation of H+ and OH- ions. While it is true that water molecules can disassociate into these ions, the conditions required for this dissociation, such as extreme temperatures or the presence of strong acids or bases, are not typically present during the normal process of boiling water. As a result, we can eliminate options C and D.
In conclusion, the white cloud rising from the spout of a boiling teapot is composed of water in the gaseous phase, making option B the correct answer.