The points on the curve in Figure 15-43 where the substance is patly solid and partly liquid are to be identified. Concept introduction: The shape of temperature versus heat graph is typical for any pure substance. When a solid below the freezing point is heated, temperature increases but when cooled, the temperature decreases. A pure substance freezes as heat is removed. A liquid boils as heat is added. At higher temperature, substance exists in gaseous form.

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Chapter 15, Problem 87E

Interpretation Introduction

Interpretation:

The points on the curve in Figure 15-43 where the substance is patly solid and partly liquid are to be identified.

Concept introduction:

The shape of temperature versus heat graph is typical for any pure substance. When a solid below the freezing point is heated, temperature increases but when cooled, the temperature decreases. A pure substance freezes as heat is removed. A liquid boils as heat is added. At higher temperature, substance exists in gaseous form.

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