Phase Changes

Question 1

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

Revolt · Accepted Answer

0°C

Question 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?

Revolt · Accepted Answer

4

Question 3

When does carbon dioxide absorb the most heat energy?

Revolt · Accepted Answer

during sublimation

Question 4

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

Revolt · Accepted Answer

1, 2, and 3

Question 5

A solid substance turns directly into a gas. Which term describes this change?

Revolt · Accepted Answer

sublimation

Question 6

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

Revolt · Accepted Answer

2

Question 7

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

Revolt · Accepted Answer

freezing ice cream

Question 8

Jean has a sample of a liquid. If she changes the liquid’s phase by

Revolt · Accepted Answer

evaporating

Question 9

is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?

Revolt · Accepted Answer

from a gas to a liquid

Question 10

The diagram below shows the different phase transitions that occur in matter.Which statement best describes the process that arrow 1 represents?

Revolt · Accepted Answer

Molecules are speeding up as boiling occurs.

Phase Changes Answers

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