How many phase changes are represented in the following heating curve of a pure substance?
A) 0
B) 1
C) 2
D) 3
E) 4

Name: How many phase changes are represented in the following heating curve of a pure substance? A) 0 B) 1 C) 2 D) 3 E) 4
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Question

How many phase changes are represented in the following heating curve of a pure substance? 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Quizplus · Accepted Answer

There are two flat regions in the heating curve where the temperature remains constant. These represent phase changes from solid to liquid and from liquid to gas. Therefore, there are two phase changes represented in the heating curve.

How Many Phase Changes Are Represented in the Following Heating