Final answer:
The correct answer is C. Boiling point, which is the temperature at which vapor pressure equals atmospheric pressure.
Step-by-step explanation:
The temperature at which vapor pressure is equal to or greater than atmospheric pressure is known as the boiling point. When a nonvolatile solute is dissolved in a liquid, the vapor pressure of the solution is lower than that of the pure solvent. As a result, the presence of a solute will cause the boiling point of a solution to be higher than that of the pure solvent, a phenomenon referred to as boiling point elevation. The normal boiling point is the temperature at which the vapor pressure of a liquid is equal to 1 atmosphere (atm). Therefore, the answer to the question is C. Boiling point.
The boiling point of a solution is always greater than that of the pure solvent due to the presence of nonvolatile solutes, resulting in boiling point elevation.
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. The presence of nonvolatile solutes in a solution lowers the vapor pressure of the solvent, resulting in an increase in the boiling point. This phenomenon is known as boiling point elevation. The boiling point of a solution is always greater than that of the pure solvent.