Textbook Question
Use the phase diagram of neon to answer the following questions. (a) What is the approximate value of the normal boiling point?
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13. Liquids, Solids & Intermolecular Forces
Phase Diagrams
Multiple Choice
In the phase diagram of methanol, what phase transition occurs at 25.0 °C when methanol evaporates?
A
Gas to liquid
B
Solid to gas
C
Solid to liquid
D
Liquid to gas
Verified step by step guidance1
Understand the concept of a phase diagram: A phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure.
Identify the relevant phase transition: The problem asks about the phase transition of methanol at 25.0 °C when it evaporates. Evaporation is the process where a liquid turns into a gas.
Locate the temperature on the phase diagram: At 25.0 °C, methanol is typically in the liquid state under standard atmospheric pressure.
Determine the phase transition: Since evaporation involves the transition from liquid to gas, the phase transition occurring at 25.0 °C when methanol evaporates is from liquid to gas.
Review the options provided: The correct phase transition for methanol at 25.0 °C when it evaporates is 'Liquid to gas', as evaporation is the process of a liquid becoming a gas.
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