Multiple Choice
When the dew point is below 0°C, which of the following occurs?
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1. Intro to General Chemistry
Temperature
Multiple Choice
At what temperature does pure water melt under standard atmospheric pressure?
A
100~^ext{o}ext{C}
B
0~^ext{o}ext{C}
C
-10~^ext{o}ext{C}
D
32~^ext{o}ext{C}
Verified step by step guidance1
Understand that the melting point of a substance is the temperature at which it changes from solid to liquid under a given pressure, typically standard atmospheric pressure (1 atm).
Recall that for pure water at 1 atm pressure, the melting point is the temperature where ice (solid water) and liquid water coexist in equilibrium.
Recognize that the standard melting point of pure water is a well-established physical constant, commonly used as a reference point in temperature scales.
Identify that the melting point of pure water under standard atmospheric pressure is 0~^\(\text{o}\)~\(\text{C}\), which means ice melts at 0 degrees Celsius.
Note that other temperatures given (such as 100~^\(\text{o}\)~\(\text{C}\), -10~^\(\text{o}\)~\(\text{C}\), and 32~^\(\text{o}\)~\(\text{C}\)) correspond to boiling point, below freezing, and the Fahrenheit freezing point respectively, but are not the melting point in Celsius.
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