The triple point of a substance is the temperature and pressure at which the substance exists as which of the following?
A.
Simultaneously in sol, gel, and plasma phases
B.
As a gel with solid and liquid trapped in gas
C.
As a sol with gas and solid trapped in liquid
D.
Simultaneously in solid, liquid, and gas phases
The triple point of a substance is the temperature and pressure at which sublimation, fusion, and condensation are taking place simultaneously.The correct answer is option B.
The triple point of a substance refers to the specific temperature and pressure conditions at which all three physical states of the substance (solid, liquid, and gas) can coexist in equilibrium.
At the triple point, the substance experiences sublimation (solid to gas), fusion (solid to liquid), and condensation (gas to liquid) simultaneously.
The triple point is a critical point for studying the behavior of substances, as it represents a unique set of conditions where all three states can exist together.
It is characterized by a specific temperature and pressure value that is unique to each substance.
Options A and C are incorrect. The triple point does not imply that all three physical states cease to exist or that the solid will always float on the liquid for all substances.
Option D is incorrect. The triple point occurs when the vapor pressure of the liquid and the solid are equal.
Option E is also incorrect. The triple point occurs when the vapor pressure of the solid and the liquid are equal, not when the vapor pressure of the solid is higher than the vapor pressure of the liquid.
In summary, the correct answer is B because the triple point represents the conditions at which sublimation, fusion, and condensation occur simultaneously.
SPJ11
The probable question may be:
- The triple point of a substance is the temperature and pressure at which:
A. all three physical states cease to exist.
B. sublimation, fusion, and condensation are taking place simultaneously.
C. the solid will always float on the liquid for all substances.
D. the vapor pressure of the liquid is higher than the vapor pressure of the solid.
E. the vapor pressure of the solid is higher than the vapor pressure of the liquid.