Energy of Phase Changes

Practice Questions

AP Chemistry › Energy of Phase Changes

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1

As condensation forms on a glass of ice water, the temperature of the air surrounding the glass __________.

2

Why does water boil at a lower temperature at high elevation?

3

How much energy is required to boil 9 moles of liquid water at its boiling point, and what is the temperature of the water vapor product?

4

Suppose that a block of ice is exactly at its melting temperature, . If heat is added evenly to the block, which of the following does not occur?

5

How much heat must be added to raise a sample of 100g of water at 270K to 280K?

The specific heat capacity of water is , and water's heat of fusion is .

6

Heating curve

Using the heat curve, define the segment time(s) that the kinetic energy of the substance is increasing.

7

Heating curve

Using the heating curve, determine which segment(s) relate to an increase in potential energy.

8

Heating curve

In the given heating curve, which segment(s) correlate to a mixture of phases?

9

Heating curve

The heating curve represents a substance in phases solid, liquid, and gas. Which segment represents only the liquid phase?

10

Heating curve

The given heating curve represents a substance in phases solid, liquid, and gas. Which segment represents the substance as it is boiling?

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