Phase Changes 100%

Consider the heating curve for water. At what temperature does the solid start melting?

0°C

The arrows in the chart below represent phase transitions. Which arrows represent the phase transitions in which heat energy is gained?

1, 2, and 3

Consider the temperature versus time graph below. In which region is the substance in both the solid phase and the liquid phase?

2

The diagram below shows the different phase transitions that occur in matter. Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?

4

The diagram below shows the different phase transitions that occur in matter. Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?

5

A solid substance turns into a liquid. Which best describes this change?

A substance that has a specific shape and volume changes to a substance that has a specific volume.

Which energy change occurs during boiling?

Heat energy is absorbed by the substance.

Consider the temperature versus time graph below. At what temperature is the boiling point of this substance?

at 120°C

Which example involves a phase change in which heat energy is released by the substance?

freezing ice cream

In which phase transition do molecules directly move from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles?

sublimation