liquids and solids chem2045 hw

Chapter 10 HW. Please explain why you chose each answer. Please show all work for all math problems. Again, please explain why you chose each answer – thank you!
– Don’t forget to complete the end of chapter exercises using the link at the end as well.

1. Which of the following is an example of intermolecular forces?

Group of answer choices
hydrogen bonding
covalent bonding
ionic bonding
metallic bonding

2.The strongest intermolecular forces present in a sample of C8H18 are

Group of answer choices
London dispersion forces
dipole–dipole forces
covalent bonds
hydrogen bonding

3.Identify the major attractive force between the particles of a sample of CaCl2(aq).

Group of answer choices
dipole -ion interactions
dipole-dipole interactions
hydrogen bonding
London dispersion forces
ionic bonding

4.Which of the following substances has the weakest intermolecular forces?

Group of answer choices
F2
I2
Cl2
Br2

5.Given the graph below, why the boiling point of H2Se is higher than H2S

Group of answer choices

The stronger London dispersion forces in H2Se increase the boiling point

The stronger dipole-dipole forces in H2Se increase the boiling point
Hydrogen bonding in H2Se increases the boiling point
The stronger covalent bonding in H2Se increases the boiling point

6.Which of the following elements or compounds has the lowest boiling point?

Group of answer choices
CO2
SiO2
SO2
PbO2

7.What is the enthalpy of vaporization ( kJ/mol) of a compound that has a vapor pressure of 555mmHg at 311 K and 55.5 mmHg at 211 K? (R = 8.31 J/(K· mol))

Group of answer choices
12.6
12556
19.13
13.3
13.589

8.How much heat (in kJ) is consumed when 255 g of water vaporizes at 373 K? The enthalpy of condensation of water at 373 K is –40.7 kJ/mol.

Group of answer choices
576
14.2
103.8
1.04×104

9.What is the name for the following phase change? C10H22(l) => C10H22(s)

Group of answer choices
solidification
liquefaction
condensation
melting
fusion

10.Which of the following phase changes is exothermic?

Group of answer choices
crystallization
vaporization
melting
sublimation

11.Which of the following is an example of a network covalent solid?

Group of answer choices
SiO2 (s)
CO2 (s)
SO2 (s)

12.Which of the following has the highest melting point?

Group of answer choices
AlCl3
PCl3
BrCl3

BCl3

13.Consider the following phase diagram of the generic compound. What type of equilibrium is associated with line BC

Group of answer choices
solid<=> liquid
solid<=> gas
liquid<=> gas
solid <=> liquid <=> gas

14.Consider the following phase diagram of the generic compound. What process does the change from point G to point F corresponds to?

Group of answer choices
condensation
vaporization
sublimation
freezing

15.Consider the following phase diagram of the generic compound. How will its vapor pressure change with increased temperature?

Group of answer choices
increase
decrease
no change
there is no vapor pressure shown on diagram

16. Consider the following heating curve of the generic compound. What segment is associated with the enthalpy of vaporization?

Group of answer choices
DE
AB
BC
CD
EF

___________________________________________________________________________________________________
Solve the following AFTER-THE-CHAPTER exercises listed below. Show your work where necessary. You do not need to rewrite the questions.
Click on this link to access the questions in the “exercises” for chapter 10 below ( 10; 18; 21; 27; 38; 53; 54;58;68;69).There is no login required
https://openstax.org/books/chemistry-atoms-first-2e/pages/1-introduction
Chapter 10: 10; 18; 21; 27; 38; 53; 54;58;68;69
 
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