   Chapter 11, Problem 67SCQ

Chapter
Section
Textbook Problem

Water (10.0 g) is placed in a thick-walled glass tube whose internal volume is 50.0 cm3. Then all the air is removed, the tube is sealed, and then the tube and contents are heated to 100 °C. (a) Describe the appearance of the system at 100 °C (b) What is the pressure inside the tube? (c) At this temperature, liquid water has a density of 0.958 g/cm3. Calculate the volume of liquid water in the tube. (d) Some of the water is in the vapor state. Determine the mass of water in the gaseous state.

(a)

Interpretation Introduction

Interpretation: The appearance of the system when water is placed in a thick- walled glass tube whose internal volume is 50cm3 has to be identified.

Concept Introduction: Vapor pressure is nothing but the pressure of a vapor in contact with its liquid or solid form.

When a liquid and vapor are in equilibrium the pressure exerted by the vapor is called the equilibrium vapor pressure.

If intermolecular force is small the vapor pressure of the substance is high and the boiling point will be low.

Explanation

As the water is placed in a thick- walled glass tube whose internal volume is 50cm3 and when air is expelled and heated at

(b)

Interpretation Introduction

Interpretation: The pressure in the tube when water is placed in a thick- walled glass tube whose internal volume is 50cm3 has to be identified.

Concept Introduction: Vapor pressure is nothing but the pressure of a vapor in contact with its liquid or solid form.

When a liquid and vapor are in equilibrium the pressure exerted by the vapor is called the equilibrium vapor pressure.

If intermolecular force is small the vapor pressure of the substance is high and the boiling point will be low.

(c)

Interpretation Introduction

Interpretation: Volume of the liquid water in the tube has to be identified.

Concept Introduction: Vapor pressure is nothing but the pressure of a vapor in contact with its liquid or solid form.

When a liquid and vapor are in equilibrium the pressure exerted by the vapor is called the equilibrium vapor pressure.

If intermolecular force is small the vapor pressure of the substance is high and the boiling point will be low.

Volume of liquid=massdensity

(d)

Interpretation Introduction

Interpretation:

Mass of water in the vapor state has to be calculated.

Concept Introduction: Vapor pressure is nothing but the pressure of a vapor in contact with its liquid or solid form.

When a liquid and vapor are in equilibrium the pressure exerted by the vapor is called the equilibrium vapor pressure.

If intermolecular force is small the vapor pressure of the substance is high and the boiling point will be low.

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