A stopper is inserted into the spout of a...

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Question 1 of 205eccef9fbacbc34ba4d46c11

A stopper is inserted into the spout of a closed container in which water has been heated to a temperature of 212°F. If additional thermal energy is imparted, what changes will occur to the pressure and temperature inside the container?

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🔍 Key Concepts

• Boiling point of water in a closed vs. open container • Relationship between pressure, temperature, and phase change • What happens when you add heat to a liquid that is already at its boiling point in a closed space

💭 Think About

• Think about how the boiling temperature of water changes when the pressure increases or decreases. Does it stay at 212°F if the container is sealed? • When water at boiling point receives more heat, where does that energy go: into raising the temperature, increasing pressure, causing more vapor to form, or some combination? • Consider whether the temperature of a pure substance can keep increasing during a phase change at constant volume.

✅ Before You Answer

• Verify what 212°F represents for water at standard atmospheric pressure (14.7 psi) in an open container. • Consider how boiling point changes with pressure in a closed container: does a higher pressure allow water to exist as a liquid at temperatures above 212°F? • Confirm whether in a rigid, closed container, adding heat after boiling starts will increase pressure, temperature, or just produce more vapor at constant temperature.

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