Question

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? done

Explanation:

Step1: Understand solid phase

In a temperature - vs - time graph, a solid is in the initial stage before melting. Here, 1 represents the solid phase as it is the starting point with the substance in solid state.

Step2: Identify melting phase

Melting is a phase - change where temperature remains constant while the substance changes from solid to liquid. The flat - part of the graph at the lower temperature is the melting stage, so 2 represents melting.

Step3: Identify boiling phase

Boiling is a phase - change where temperature remains constant while the substance changes from liquid to gas. The flat - part of the graph at the higher temperature is the boiling stage, so 4 represents boiling.

Answer:

Which number on the graph represents a solid? 1
Which number on the graph represents the phase change melting? 2
Which number on the graph represents the phase change boiling? 4