Phase Changes

Question 1

Which statements describe phase changes? Check all that apply.

Revolt · Accepted Answer

Particles in a liquid need to move more slowly in order to freeze.; Attractive forces between the particles in a liquid are broken when a liquid boils.

Question 2

In a lab, methane and nitrogen are cooled from -170°C to -200°C. The methane freezes and the nitrogen boils✔ condensesmeltssublimates

Revolt · Accepted Answer

condenses

Question 3

When gold is heated to 2,856°C it changes from a liquid to a ✔ gasliquid solid.

Revolt · Accepted Answer

gas

Question 4

Energy is released during which phase changes? Check all that apply.

Revolt · Accepted Answer

condensing; depositing; freezing

Question 5

Use the table to answer the questions below.When the temperature in a room increases from 25°C to 33°C, ✔ galliumgold methanenitrogen changes from a solid to a liquid.

Revolt · Accepted Answer

gallium; Selection 1: gallium; Selection 2: condenses; Selection 3: gas

Question 6

Which statement describes how phase changes can be diagrammed as a substance is heated?

Revolt · Accepted Answer

The temperature is on the y-axis and the time is on the x-axis.

Question 7

Use the information in the table to describe the temperature-vs.-time diagrams.Which number on the graph represents a solid? Which number on the graph represents the phase change melting? Which number on the graph represents the phase change boiling?

Revolt · Accepted Answer

Selection 1: 1; Selection 2: 2; Selection 3: 4

Question 8

Considering the chart shown, at what temperature does the substance boil?

Revolt · Accepted Answer

2,200ºC

Question 9

Which statement describes the appearance of a temperature-vs.-time graph?

Revolt · Accepted Answer

Horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases.

Phase Changes Answers

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