Chemistry (AP Edition)
Chemistry (AP Edition)
9th Edition
ISBN: 9781133611103
Author: Steven S. Zumdahl, Susan A. Zumdahl
Publisher: Brooks Cole
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Chapter 5, Problem 41E

A diagram for an open-tube manometer is shown below.

Chapter 5, Problem 41E, A diagram for an open-tube manometer is shown below. If the flask is open to the atmosphere, the , example  1

If the flask is open to the atmosphere, the mercury levels are equal. For each of the following situations where a gas is contained in the flask, calculate the pressure in the flask in torr, atmospheres, and pascals.

Chapter 5, Problem 41E, A diagram for an open-tube manometer is shown below. If the flask is open to the atmosphere, the , example  2

c. Calculate the pressures in the flask in parts a and b (in torr) if the atmospheric pressure is 635 torr.

(a)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

The pressure of the gases in given two situations of manometers (a) and (b) should be determined in units of torr, atm and pascals when the manometer shows a reading of 118mm and 215mm respectively. And also calculate the pressure of the gases in given two situations of manometers (a) and (b) If the atmospheric pressure is 635 torr.

Concept Introduction:

The manometer is a devise used measure the pressure of a gas. The pressure of gas is determined by the value of ‘h’ shown by the manometer. This ‘h’-value is added or subtracted with atmospheric pressure to determine the pressure of gas.

If the flask side mercury level is decreased after the filling of gas, then the ‘h’-value will be added to atmospheric pressure to get the pressure of gas.

If the flask side mercury level is increased after the filling of gas, then the ‘h’-value will be subtracted from the atmospheric pressure to get the pressure of gas.

The pressure equivalent of ‘h’ value is,

h=1mm=1mmHg

Pressure of a substance can be stated in various units. The units of pressure are interconvertible. The relations between units of pressure are,

  • Since the unit mm Hg and the unit torr is used interchangeably.

1mmHg = 1torr

  • Conversion of 1 torr into atm is,

                     1mmHg = 1760atm 

  • The 1 mm Hg pressure in Pa unit is,

                                 1mmHg = 101325760Pa

Answer to Problem 41E

The pressure of the given gas (figure-a) in units of torr, atm and pascal are,

642 torr, 0.8447 atm, 85593 Pa

Explanation of Solution

The given ‘h’ value for the gas in manometer is 118mm. The picture of manometer shows the    flask side mercury level is increased after the filling of gas.

Hence the equation for finding the pressure of gas is,

Atmospheric pressureh(inmm)

That is,

=    (760118)mmHg

=    642mmHg

The calculated pressure is 642 mm Hg; the mm Hg and torr units are used interchangeably,

Therefore,

642mmHg = 642torr

The calculated pressure is 642mm Hg. So the pressure in atm unit is,

642mmHg = 642mmHg*1760mmHgatm 

     =      0.8447atm

The calculated pressure is 642mm Hg. So the pressure in Pa unit is,

642mmHg = 642mmHg*101325760mmHgPa

   =85593Pa

(b)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

The pressure of the gases in given two situations of manometers (a) and (b) should be determined in units of torr, atm and pascals when the manometer shows a reading of 118mm and 215mm respectively. And also calculate the pressure of the gases in given two situations of manometers (a) and (b) If the atmospheric pressure is 635 torr.

Concept Introduction:

The manometer is a devise used measure the pressure of a gas. The pressure of gas is determined by the value of ‘h’ shown by the manometer. This ‘h’-value is added or subtracted with atmospheric pressure to determine the pressure of gas.

If the flask side mercury level is decreased after the filling of gas, then the ‘h’-value will be added to atmospheric pressure to get the pressure of gas.

If the flask side mercury level is increased after the filling of gas, then the ‘h’-value will be subtracted from the atmospheric pressure to get the pressure of gas.

The pressure equivalent of ‘h’ value is,

h=1mm=1mmHg

Pressure of a substance can be stated in various units. The units of pressure are interconvertible. The relations between units of pressure are,

  • Since the unit mm Hg and the unit torr is used interchangeably.

1mmHg = 1torr

  • Conversion of 1 torr into atm is,

                     1mmHg = 1760atm 

  • The 1 mm Hg pressure in Pa unit is,

                                 1mmHg = 101325760Pa

Answer to Problem 41E

The pressure of the given gas (figure-b) in units of torr, atm and pascal are,

878 torr, 1.1552 atm, 117057 Pa

Explanation of Solution

The given ‘h’ value for the gas in manometer is 118mm. The picture of manometer shows the    flask side mercury level is decreased after the filling of gas.

Hence the equation for finding the pressure of gas is,

Atmospheric pressure+h(inmm)

That is,

=   (760+118)mmHg

=   878mmHg

The calculated pressure is 878 mm Hg; the mm Hg and torr units are used interchangeably,

Therefore,

878mmHg = 878torr

The calculated pressure is 878mm Hg. So the pressure in atm unit is,

878mmHg = 878mmHg*1760mmHgatm 

     =      1.1552atm

The calculated pressure is 878mm Hg. So the pressure in Pa unit is,

878mmHg = 878mmHg*101325760mmHgPa

   =117057Pa

(c)

Expert Solution
Check Mark
Interpretation Introduction

Interpretation:

The pressure of the gases in given two situations of manometers (a) and (b) should be determined in units of torr, atm and pascals when the manometer shows a reading of 118mm and 215mm respectively. And also calculate the pressure of the gases in given two situations of manometers (a) and (b) If the atmospheric pressure is 635 torr.

Concept Introduction:

The manometer is a devise used measure the pressure of a gas. The pressure of gas is determined by the value of ‘h’ shown by the manometer. This ‘h’-value is added or subtracted with atmospheric pressure to determine the pressure of gas.

If the flask side mercury level is decreased after the filling of gas, then the ‘h’-value will be added to atmospheric pressure to get the pressure of gas.

If the flask side mercury level is increased after the filling of gas, then the ‘h’-value will be subtracted from the atmospheric pressure to get the pressure of gas.

The pressure equivalent of ‘h’ value is,

h=1mm=1mmHg

Pressure of a substance can be stated in various units. The units of pressure are interconvertible. The relations between units of pressure are,

  • Since the unit mm Hg and the unit torr is used interchangeably.

1mmHg = 1torr

  • Conversion of 1 torr into atm is,

                     1mmHg = 1760atm 

  • The 1 mm Hg pressure in Pa unit is,

                                 1mmHg = 101325760Pa

Answer to Problem 41E

The pressure of the given gas (figure-a) in units of torr, atm and pascal when the atmospheric pressure is 635 torr are,

517 torr, 0.8141 atm, 82496 Pa

The pressure of the given gas (figure-b) in units of torr, atm and pascal when the atmospheric pressure is 635 torr are,

753 torr, 1.1858 atm, 120154 Pa

Explanation of Solution

The pressure of the gas in given situation of manometer (a) in units of torr, atm and pascals:

The given ‘h’ value for the gas in manometer (a) is 118mm. The picture of manometer shows the    flask side mercury level is increased after the filling of gas.

Hence the equation for finding the pressure of gas is,

Atmospheric pressureh(inmm)

That is,

=   (635118)mmHg

=   517mmHg

The calculated pressure is 517 mm Hg; the mm Hg and torr units are used interchangeably,

Therefore,

517mmHg = 517torr

The calculated pressure is 517mm Hg. So the pressure in atm unit is,

517mmHg = 517mmHg*1760mmHgatm 

     =      0.8141atm

The calculated pressure is 517mm Hg. So the pressure in Pa unit is,

517mmHg = 517mmHg*101325760mmHgPa

   =82496Pa

The pressure of the gas in given situation of manometer (b) in units of torr, atm and pascals:

The given ‘h’ value for the gas in manometer is 118mm. The picture of manometer shows the    flask side mercury level is decreased after the filling of gas.

Hence the equation for finding the pressure of gas is,

Atmospheric pressure+h(inmm)

That is,

=   (635+118)mmHg

=   753mmHg

The calculated pressure is 753 mm Hg; the mm Hg and torr units are used interchangeably,

Therefore,

753mmHg = 753torr

The calculated pressure is 753 mm Hg. So the pressure in atm unit is,

753mmHg = 753mmHg*1760mmHgatm 

     =      1.1858atm

The calculated pressure is 753 mm Hg. So the pressure in Pa unit is,

753mmHg = 753mmHg*101325760mmHgPa

   =120154Pa

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Chapter 5 Solutions

Chemistry (AP Edition)

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