Phase Changes

Question 1

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

Revolt · Accepted Answer

condenses

Question 2

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

Revolt · Accepted Answer

gas

Question 3

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 4

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 5

Use the information in the table to describe the temperature-vs.-time diagrams.Which number on the graph represents a solid? 1234

Revolt · Accepted Answer

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

Question 6

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

Revolt · Accepted Answer

2,200ºC

Question 7

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.

Question 8

Which number on the graph represents the phase change melting? 1234

Revolt · Accepted Answer

2

Question 9

Which number on the graph represents the phase change boiling? 2345

Revolt · Accepted Answer

4

Phase Changes Answers

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