Temperature 273.16 K and Pressure 611 Pa
The triple point of water is a fundamental concept in thermodynamics and it represents the unique set of conditions at which water can coexist in its solid, liquid, and gaseous phases simultaneously. This is a specific and well-defined point, both in terms of temperature and pressure.
Let's analyze the given options:
- Temperature 273.16 K and Pressure 1 Pa: Although the temperature is correct, the pressure is too low. The standard pressure at the triple point is much higher.
- Temperature 273.16 K and Pressure 611 Pa: This is the scientifically accepted value for the triple point of water. At 273.16 K and 611 Pa, water can simultaneously exist in the solid, liquid, and vapor phases.
- Temperature 0 K and Pressure 103 Pa: Temperature of 0 K is absolute zero, where all molecular motion ceases. This cannot be the triple point of any substance.
- Temperature 373 K and Pressure 6.11 x 10-3 Pa: This temperature is equivalent to the boiling point of water at 1 atmospheric pressure, not the triple point. 373 K is much higher than the triple point temperature.
Based on this analysis, the correct answer is: Temperature 273.16 K and Pressure 611 Pa.
This value is universally recognized in scientific and engineering contexts for the calibration of temperature measurement instruments, among other applications.
Important Questions from Thermodynamics
If the work done on the system or by the system· is zero, which one of the following statements for a gas kept at a certain volume is correct?
A system that does NOT allow exchange of heat with its surrounding is called
A system that does NOT allow exchange of heat with its surrounding is called
For a certain reaction, ΔG θ = -45 kJ/mol and ΔH θ = -90 kJ/mol at 0 °C. What is the minimum temperature at which the reaction will become spontaneous, assuming that ΔH θ and ΔS θ are independent of temperature?
- Which of the following statements correctly describes the thermodynamic classification of entropy?
