Question 1

Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 30.0°C to gaseous CCl4 at 76.8°C (the normal boiling point for CCl4) .The specific heat of CCl4(l) is 0.857 J/(g ∙ °C) ,its heat of fusion is 3.27 kJ/mol,and its heat of vaporization is 29.82 kJ/mol.

Accepted Answer

A)   1.00 kJ
B)   1.53 kJ
C)   5.85 kJ
D)   6.38 kJ

Question 2

Choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force.

Accepted Answer

A)   N2
B)   SO2
C)   H2O
D)   CBr4
E)   BCl3

Question 3

Define viscosity.

Accepted Answer

Viscosity ...

Question 4

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g/mol) at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful.
ΔHvap = 33.9 kJ/mol
ΔHfus = 9.8 kJ/mol
Cliq = 1.73 J/g°C
Cgas = 1.06 J/g°C
Csol = 1.51 J/g°C
Tmelting = 279.0 K
Tboiling = 353.0 K

Accepted Answer

A)   38.9 kJ
B)   95.4 kJ
C)   67.7 kJ
D)   54.3 kJ
E)   74.4 kJ

Question 5

Place the following substances in order of increasing boiling point. CH3CH2CH2CH2OH Ar CH3OCH3

Accepted Answer

A)   Ar 3OCH3 3CH2OH
B)   CH3CH2OH 3OCH3
C)   CH3CH2OH 3OCH3  
D)   CH3OCH3 3CH2OH
E)   Ar 3CH2OH 3OCH3

Question 6

Define freezing.

Accepted Answer

A)   the phase transition from solid to gas
B)   the phase transition from gas to solid
C)   the phase transition from gas to liquid
D)   the phase transition from liquid to gas
E)   the phase transition from liquid to solid

Question 7

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol) from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔHfus = 7.27 kJ/mol
Cliq = 2.16 J/g°C
Cgas = 1.29 J/g°C
Csol = 1.65 J/g°C
Tmelting = -95.0°C

Accepted Answer

A)   8.48 kJ
B)   18.5 kJ
C)   32.2 kJ
D)   29.4 kJ
E)   9.97 kJ

Question 8

How much energy is required to vaporize 178 g of butane (C4H10) at its boiling point,if its ΔHvap is 24.3 kJ/mol?

Accepted Answer

A)   13.4 kJ
B)   74.6 kJ
C)   41.9 kJ
D)   2.31 kJ
E)   43.3 kJ

Exam 11: Liquids,solids,and Intermolecular Forces

Define viscosity.

Correct Answer
verified
Viscosity ...
View Answer

How much energy is required to vaporize 178 g of butane (C₄H₁₀) at its boiling point,if its ΔH_vap is 24.3 kJ/mol?

Correct Answer
verified

Define freezing.

Correct Answer
verified

Choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force.

Correct Answer
verified

Correct Answer
verified

Place the following substances in order of increasing boiling point. CH₃CH₂CH₂CH₂OH Ar CH₃OCH₃

Correct Answer
verified

Calculate the total quantity of heat required to convert 25.0 g of liquid CCl₄(l) from 30.0°C to gaseous CCl₄ at 76.8°C (the normal boiling point for CCl₄) .The specific heat of CCl₄(l) is 0.857 J/(g ∙ °C) ,its heat of fusion is 3.27 kJ/mol,and its heat of vaporization is 29.82 kJ/mol.

Correct Answer
verified

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol) from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔH_fus = 7.27 kJ/mol C_liq = 2.16 J/g°C C_gas= 1.29 J/g°C C_sol = 1.65 J/g°C T_melting= -95.0°C

Correct Answer
verified

Exam 11: Liquids,solids,and Intermolecular Forces

Define viscosity.

Correct AnswerverifiedViscosity ...View AnswerShow Answer

How much energy is required to vaporize 178 g of butane (C4H10) at its boiling point,if its ΔHvap is 24.3 kJ/mol?

Correct AnswerverifiedShow Answer

Define freezing.

Correct AnswerverifiedShow Answer

Choose the molecule or compound that exhibits dipole-dipole forces as its strongest intermolecular force.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Place the following substances in order of increasing boiling point. CH3CH2CH2CH2OH Ar CH3OCH3

Correct AnswerverifiedShow Answer

Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 30.0°C to gaseous CCl4 at 76.8°C (the normal boiling point for CCl4) .The specific heat of CCl4(l) is 0.857 J/(g ∙ °C) ,its heat of fusion is 3.27 kJ/mol,and its heat of vaporization is 29.82 kJ/mol.

Correct AnswerverifiedShow Answer

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol) from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔHfus = 7.27 kJ/mol Cliq = 2.16 J/g°C Cgas = 1.29 J/g°C Csol = 1.65 J/g°C Tmelting = -95.0°C

Correct AnswerverifiedShow Answer

Correct Answer
verified
Viscosity ...
View Answer

How much energy is required to vaporize 178 g of butane (C₄H₁₀) at its boiling point,if its ΔH_vap is 24.3 kJ/mol?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Place the following substances in order of increasing boiling point. CH₃CH₂CH₂CH₂OH Ar CH₃OCH₃

Correct Answer
verified

Calculate the total quantity of heat required to convert 25.0 g of liquid CCl₄(l) from 30.0°C to gaseous CCl₄ at 76.8°C (the normal boiling point for CCl₄) .The specific heat of CCl₄(l) is 0.857 J/(g ∙ °C) ,its heat of fusion is 3.27 kJ/mol,and its heat of vaporization is 29.82 kJ/mol.

Correct Answer
verified

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g/mol) from a solid at -154.0°C to a liquid at -42.0°C? The following physical data may be useful. ΔH_fus = 7.27 kJ/mol C_liq = 2.16 J/g°C C_gas= 1.29 J/g°C C_sol = 1.65 J/g°C T_melting= -95.0°C

Correct Answer
verified