Multiple Choice
At what temperature (in Fahrenheit) does pure water freeze under standard atmospheric pressure?
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1. Intro to General Chemistry
Temperature
Multiple Choice
Which of the following substances would have the highest temperature under standard atmospheric conditions?
A
Ice water
B
Liquid water
C
Water vapor
Verified step by step guidance1
Understand that temperature under standard atmospheric conditions refers to the temperature at which each substance exists in equilibrium at 1 atm pressure.
Recall the phases of water at 1 atm: ice water (solid-liquid equilibrium) is at 0°C, liquid water is typically around 25°C (room temperature), and water vapor (gas phase) is at 100°C when in equilibrium with liquid water.
Recognize that water vapor at 1 atm pressure corresponds to the boiling point of water, which is higher than the melting point (ice water) and typical liquid water temperature.
Compare the temperatures associated with each phase: ice water at 0°C, liquid water around 25°C, and water vapor at 100°C under standard atmospheric pressure.
Conclude that water vapor has the highest temperature among the given substances under standard atmospheric conditions because it exists at the boiling point of water.
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