Multiple Choice
What is the boiling point of water in kelvins at standard atmospheric pressure?
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1. Intro to General Chemistry
Temperature
Multiple Choice
At what temperature does water boil at standard atmospheric pressure?
A
100~^{m o}C
B
50~^{m o}C
C
0~^{m o}C
D
212~^{m o}C
Verified step by step guidance1
Understand that the boiling point of a liquid is the temperature at which its vapor pressure equals the external pressure. At standard atmospheric pressure (1 atm), water boils when its vapor pressure reaches 1 atm.
Recall that the standard atmospheric pressure is defined as 1 atm, which is equivalent to 760 mmHg or 101.3 kPa.
Know that the commonly accepted boiling point of pure water at 1 atm pressure is 100~^{\(\circ\)}C. This is a standard reference point in chemistry.
Recognize that the other temperatures listed (50~^{\(\circ\)}C, 0~^{\(\circ\)}C, 212~^{\(\circ\)}C) correspond to different physical phenomena or conditions: 0~^{\(\circ\)}C is the freezing point of water, 212~^{\(\circ\)}F (not Celsius) is the boiling point in Fahrenheit, and 50~^{\(\circ\)}C is below boiling under standard pressure.
Therefore, conclude that water boils at 100~^{\(\circ\)}C under standard atmospheric pressure.
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