Phase Changes Answers

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

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

A horizontal line shows that the temperature increases at a constant rate over time.

A vertical line shows that the temperature decreases at a constant rate over time.

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

Horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

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

200ºC

1,200ºC

2,200ºC

2,400ºC

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