H HH Η Η Η H-C-C-C=H H-C-C-C-H ОН ОН ОН CI CI ČI Glycerol Trichloropropane Boiling point 290°C Boiling point 157°C The structural formulas of glycerol and trichloropropane are given above. Both compounds are liquids at 25°C. a. For each compound, identify all types of intermolecular forces present in the liquid. Explain why glycerol has the higher boiling point in terms of the relative strengths of the intemmolecular forces. b. Glycerol (molar mass 92.09 g/mol) has been suggested for use as an altemative fuel. The enthalpy of combustion, AH®comb , of glycerol is -1654 kJ/mol. What mass of glycerol would need to be combusted to heat 500.0 g of water from 20.0°C to 100.0°C ? (The specific heat capacity of water is 4.184 J/(g-°C). Assume that all the heat released by the combustion reaction is absorbed by the water.)
H HH Η Η Η H-C-C-C=H H-C-C-C-H ОН ОН ОН CI CI ČI Glycerol Trichloropropane Boiling point 290°C Boiling point 157°C The structural formulas of glycerol and trichloropropane are given above. Both compounds are liquids at 25°C. a. For each compound, identify all types of intermolecular forces present in the liquid. Explain why glycerol has the higher boiling point in terms of the relative strengths of the intemmolecular forces. b. Glycerol (molar mass 92.09 g/mol) has been suggested for use as an altemative fuel. The enthalpy of combustion, AH®comb , of glycerol is -1654 kJ/mol. What mass of glycerol would need to be combusted to heat 500.0 g of water from 20.0°C to 100.0°C ? (The specific heat capacity of water is 4.184 J/(g-°C). Assume that all the heat released by the combustion reaction is absorbed by the water.)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter22: Organic And Biological Molecules
Section: Chapter Questions
Problem 176MP
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Transcribed Image Text:7.
H HH
H H H
|| |
H-C-C -C-H
H-C-C =c-H
ОН ОН ОН
CI CI CI
Glycerol
Trichloropropane
Boiling point 290°C
Boiling point 157°C
The structural formulas of glycerol and trichloropropane are given above. Both compounds are liquids at 25°C.
a. For each compound, identify all types of intermolecular forces present in the liquid. Explain why
glycerol has the higher boiling point in terms of the relative strengths of the intermolecular forces.
b. Glycerol (molar mass 92.09 g/mol) has been suggested for use as an alternative fuel. The enthalpy of
combustion, AH® comb , of glycerol is -1654 kJ/mol. What mass of glycerol would need to be combusted
to heat 500.0 g of water from 20.0°C to 100.0°C ? (The specific heat capacity of water is 4.184 J/(g-°C).
Assume that all the heat released by the combustion reaction is absorbed by the water.)
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