Which of the following statements is correct for the statement "Vapor pressure of water at 0 C is 5 mmHg"
Correct answer: C. if external pressure is 5 mmHg then water will boil at 0 C
- A. boiling point of water will be 0 C at 5 mmHg
- B. boiling point of water will be 0 C
- C. if external pressure is 5 mmHg then water will boil at 0 C
- D. boiling point of water is 100 C at 760 mmHg pressure
Explanation
Explanation: The statement "Vapor pressure of water at 0 C is 5 mmHg" implies that at 0 degrees Celsius, the water vapor exerts a pressure of 5 mmHg. According to Raoult's law, for a pure substance, the vapor pressure is directly related to the temperature. When the vapor pressure equals the external pressure, the substance will boil.In this case, if the external pressure is 5 mmHg, and the vapor pressure of water at 0 degrees Celsius is also 5 mmHg, then water will boil at 0 degrees Celsius. This is because the vapor pressure equals the external pressure, allowing the liquid to transition into vapor.
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