MCGRAW: CHEMISTRY THE MOLECULAR NATURE
MCGRAW: CHEMISTRY THE MOLECULAR NATURE
8th Edition
ISBN: 9781264330430
Author: VALUE EDITION
Publisher: MCG
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Chapter 1, Problem 1.42P

(a)

Interpretation Introduction

Interpretation:

The tempertaure in Fahrenheit (°F) is to be converted into degree Celcius (°C) and Kelvin (K).

Concept introduction:

The temperature of an object is the measure of the coldness and hotness of the object relative to another object. The S.I unit of temperature is Kelvin (K). The other units of temperature are degree Celcius (°C) and Fahrenheit (°F).

The first is the Fahrenheit (°F) scale common in the United States. On this scale, the freezing point of water is 32 °F and the boiling point is 212 °F. The room temperature is around 72 °F on this scale.

The other scale common in countries apart from the United States is the Celsius (°C) scale. On this scale, the freezing point of water is 0 °C and the boiling point of water is 100 °C. The room temperature is around 22 °C.

The third scale is the Kelvin scale which is also known as Absolute scale.

The conversion factor to convert temperature from degree Celsius to Kelvin is,

T(K)=T(°C)+273.15 (1)

The conversion factor to convert temperature from Fahrenheit to degree Celsius is,

T(°C)=59(T(°F)32) (2)

(a)

Expert Solution
Check Mark

Answer to Problem 1.42P

The tempertaure 68 °F in degree Celcius (°C) and Kelvin (K) is 20 °C and 293 K respectively.

Explanation of Solution

The temperature in Fahrenheit (°F) is 68 °F.

Substitute 68 °F for T(°F) in equation (2) to calculate the temperature in degree Celsius.

T(°C)=59(68 °F32)=59(36)=20 °C

Substitute 20 °C for T(°C) in equation (1) to calculate the temperature in Kelvin.

T(K)=20 °C+273.15=293.15=293 K

Conclusion

The temperature of an object can be calculated in three different units by using the proper conversion factor. The tempertaure 68 °F in degree Celcius (°C) and Kelvin (K) is 20 °C and 293 K respectively.

(b)

Interpretation Introduction

Interpretation:

The boiling point of methane in Kelvin (K) and Fahrenheit (°F) is to be calculated.

Concept introduction:

The temperature of an object is the measure of the coldness and hotness of the object relative to another object. The S.I unit of temperature is Kelvin (K). The other units of temperature are degree Celcius (°C) and Fahrenheit (°F).

The first is the Fahrenheit (°F) scale common in the United States. On this scale, the freezing point of water is 32 °F and the boiling point is 212 °F. The room temperature is around 72 °F on this scale.

The other scale common in countries apart from the United States is the Celsius (°C) scale. On this scale, the freezing point of water is 0 °C and the boiling point of water is 100 °C. The room temperature is around 22 °C.

The third scale is the Kelvin scale which is also known as Absolute scale.

The conversion factor to convert temperature from degree Celsius to Kelvin is,

T(K)=T(°C)+273.15 (1)

The conversion factor to convert temperature from degree Celsius to Fahrenheit is,

T(°F)=95T(°C)+32 (3)

(b)

Expert Solution
Check Mark

Answer to Problem 1.42P

The boiling point of methane in Kelvin (K) and Fahrenheit (°F) is 109 K and 263 °F respectively.

Explanation of Solution

The boiling point of methane is 164 °C.

Substitute 164 °C for T(°C) in equation (1) to calculate the temperature in Kelvin.

T(K)=164 °C+273.15=109.15=109 K

Substitute 164 °C for T(°C) in equation (3) to calculate the temperature in Fahrenheit.

T(°F)=95(164 °C)+32=295.2+32=263.2=263 °F

Conclusion

The temperature of an object can be calculated in three different units by using the proper conversion factor. The boiling point of methane in Kelvin (K) and Fahrenheit (°F) is 109 K and 263 °F respectively.

(c)

Interpretation Introduction

Interpretation:

The value of coldest possible temeperature absolute zero (0 K) is to be calculated in degree Celcius (°C) and Fahrenheit (°F).

Concept introduction:

The temperature of an object is the measure of the coldness and hotness of the object relative to another object. The S.I unit of temperature is Kelvin (K). The other units of temperature are degree Celcius (°C) and Fahrenheit (°F).

The first is the Fahrenheit (°F) scale common in the United States. On this scale, the freezing point of water is 32 °F and the boiling point is 212 °F. The room temperature is around 72 °F on this scale.

The other scale common in countries apart from the United States is the Celsius (°C) scale. On this scale, the freezing point of water is 0 °C and the boiling point of water is 100 °C. The room temperature is around 22 °C.

The third scale is the Kelvin scale which is also known as Absolute scale.

The conversion factor to convert temperature from Kelvin to degree Celsius is,

T(°C)=T(K)273.15 (4)

The conversion factor to convert temperature from degree Celsius to Fahrenheit is,

T(°F)=95T(°C)+32 (3)

(c)

Expert Solution
Check Mark

Answer to Problem 1.42P

The value of coldest possible temeperature absolute zero (0 K) in degree Celcius (°C) and Fahrenheit (°F) is  273 °C and 460 °F respectively.

Explanation of Solution

The coledest possible temeperature is 0 K.

Substitute 0 K for T(°K) in equation (4) to calculate the temperature in degree Celsius.

T(°C)=0 K273.15=273.15=273 °C

Substitute 273.15 for T(°C) in equation (3) to calculate the temperature in Fahrenheit.

T(°F)=95(273.15)+32=491.67+32=459.67=460 °F

Conclusion

The temperature of an object can be calculated in three different units by using the proper conversion factor. The value of coldest possible temeperature absolute zero (0 K) in degree Celcius (°C) and Fahrenheit (°F) is  273 °C and 460 °F respectively.

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Chapter 1 Solutions

MCGRAW: CHEMISTRY THE MOLECULAR NATURE

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