HCC CHEM1305 2021 January Chapter 11 Homework Assignment Latest

Question # 00632291
Course Code : CHEM1305
Subject: Chemistry
Due on: 02/09/2022
Posted On: 02/09/2022 02:21 AM
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CHEM1305 Introductory Chemistry

Chapter 11 Homework Assignment  

Question 1Liquids have a variable shape, but a fixed volume.

  True

  False

 Question 2What type of intermolecular forces exist between molecules of Cl2?

  dipole-dipole attractions

  dispersion forces

  intramolecular bonding

  hydrogen bonding

 Question 3Which of the following liquids has the highest surface tension?

  CHCl3

  H2O

  C5H12

  CS2

 Question 4Which of the following liquids has the highest viscosity?

  C5H12

  C6H14

  C7H16

  C8H18

 Question 5What is the term for the change of physical state from liquid to solid?

  melting

  sublimation

  freezing

  condensation

 Question 6Heat energy is NOT required to turn liquid water into gaseous water vapor.

  True

  False

 Question 7Use the phase diagram below to answer what physical state H2O is at 99 °C and 500 kPa.

A graph is shown where the x-axis is labeled “Temperature in degrees Celsius” and the y-axis is labeled “Pressure ( k P a ).” A line extends from the origin of the graph which is labeled “A” sharply upward to a point in the bottom third of the diagram labeled “B” where it branches into a line that slants slightly backward until it hits the highest point on the y-axis labeled “D” and a second line that extends to the upper right corner of the graph labeled “C”. C is labeled “Critical point, with a dotted line extending downward to the x-axis labeled 374 degrees Celsius, and another dotted line extending to the y-axis labeled 22,089 k P a. The two lines bisect the graph area to create three sections, labeled “Ice (solid)” near the middle left, “Water (liquid)” in the top middle and “Water vapor (gas)” near the bottom middle. Point B is labeled “Triple point” and has a dotted line extending downward to the x-axis labeled 0.01, and another dotted line extending to the y-axis labeled 0.6. Halfway between points B and C a dotted line extends from the originally discussed line downward to the point 100 degrees Celsius on the x-axis, and another dotted line extends to the y-axis at 101 k P a. Another dotted line extends from this dotted line downward at 0 degrees Celsius.

  solid

  liquid

  gas

 Question 8Solids can readily compress and expand.

  True

  False

 Question 9Identify the type of crystalline solid (metallic, network covalent, ionic, or molecular) formed by each of the following substances:

a. Timetallic

 

 b. S8molecular

c. KBrionic

d. SiO2network covalent

Question 10Classify each substance as either a metallic, ionic, or molecular solid:

a) a hard, brittle substance that has a very high melting point metallic

b) a dull substance that is not soluble in water and has a low melting point molecular

c) a shiny substance that is a very good conductor of electricity ionic

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