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Riverside City College Properties of Ionic Molecular Network Worksheet

Riverside City College Properties of Ionic Molecular Network Worksheet

Question Description

1. Categorize the molecules and statements based on whether they are an example or property of an ionic solid, molecular solid, network (atomic) solid, or all three.

IonicMolecularNetwork (atomic)Describes all three

Answer Bank : Diamond, poor conductor in solid form, typically low melting points, composed of molecules,compound of ions, P4, Crystalline solid, graphite, good conductor of electricity when dissolved in solution, NaCl, composed of atoms connected by covalent bonds, nonconductor of electricity when dissolved in solution

2. Match each property of a liquid to what it indicates about the relative strength of the intermolecular forces in that liquid.

Strong intermolecular forcesWeak intermolecular forces

Answer Bank: high vapor pressure, high viscosity, high boiling point, high surface tension


3. If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond?

Which of the substances have polar interactions (dipole–dipole forces) between molecules?

Which substances exhibit only London (dispersion) forces?

Classify each substance based on the intermolecular forces present in that substance.

Hydrogen bonding, dipole–dipole, and dispersionDipole–dipole and dispersion onlyDispersion only

Answer Bank : H2, HCl, HF, CO


7. How much heat energy is required to convert 62.5 g

of liquid sulfur dioxide, SO2,

at 208.6 K

to gaseous SO2

at 263.1 K if the molar heat of vaporization of SO2

is 24.9 kJ/mol, and the specific heat capacity (

) of liquid SO2

is 1.36 J/(g·C)?

kJ

8. How much heat energy is required to convert 88.3 g

of solid iron at 27 C

to liquid iron at 1538 C?

The molar heat of fusion of iron is 13.8 kJ/mol. Iron has a normal melting point of 1538 C.

The specific heat capacity of solid iron is 0.449 J/(g·C).

kJ

9. How much heat energy is required to melt 772.6 g

of HBr

? The molar heat of fusion of HBr

is 2.41 kJ/mol

.

kJ

10.

How many grams of benzene, C6H6

, can be melted with 54.0

kJ of heat energy? The molar heat of fusion of benzene is 9.95 kJ/mol.

____g


11. How much heat energy is required to boil 95.2 g

of ammonia, NH3?

The molar heat of vaporization of ammonia is 23.4 kJ/mol.

kJ

12. How many grams of ethanol, C2H5OH,

can be boiled with 277.4 kJ

of heat energy? The molar heat of vaporization of ethanol is 38.6 kJ/mol.

g

13. Label the heating curve with the phase or phases present. Assume constant pressure.

A graph with an x axis that is labeled heat added and a y axis that is labeled temperature. There is a single line with five areas of change. From the origin, the line extends with a positive slope labeled with bin 5, then extends with a zero slope labeled with bin 4, then extends with a positive slope labeled with bin 3, then extends with a zero slope labeled with bin 2, then extends again with a positive slope labeled with bin 1 to the end of the graph.


Answer Bank: liquid only, gas only, solid and liquid , liquid and gas , solid only

Find the melting point and boiling point of each substance.

°C

°C

°C

°C

°C

°C


15. Use the changes of state interactive to answer the question.

Identify the states of matter present at various points along the phase change diagram for water. The

‑axis shows the energy added. The

‑axis measures temperature in degrees Celcius.

The temperature in degrees Celsius is plotted on the y axis from -60 to 140 versus the heat added in kilojoules on the x axis from 0 to 320. The curve increases linearly from -50 degrees celsius to 0 degrees celsius as the heat increases to 10 k J. The curve is then flat at 0 degrees celsius as the heat added increases to 40 k J. The curve then increases linearly again from 0 degrees celsius to 100 degrees celsius as the heat increases to 90 k J. The curve is then flat at 100 degrees celsius as the heat added increases to 300 k J. The curve then increases linearly again from 100 degrees celsius to 140 degrees celsius as the heat increases to 320 k J.


answer bank : liquid only, gas only, solid and liquid , liquid and gas , solid only

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