1. Module 2 Intro

1.19. Lesson 4 Intro

Lesson 4

Module 2—Chemical Compounds

Lesson 4—Intermolecular Forces

 

Get Focused

 

A photograph shows a car parked by the side of the road with three young adults standing beside it. The hood to the engine compartment is open, and a large quantity of steam is coming from the area of the engine. One adult is looking into the engine compartment, while the other two are standing beside the car. Their faces are hidden by the cloud of steam.

© robcocquyt/shutterstock

Although we cannot see intermolecular forces, they do influence the behaviour of matter. In the previous lesson you observed how the polarity of a molecule can be examined, and you learned that the polarity of compounds is important to their function in a technology like non-stick cookware. It might not seem immediately apparent when your car overheats on a deserted stretch of road, but boiling point is another property of matter that is influenced by intermolecular bonds. You may recall from your driver training course that antifreeze is an important substance that helps to maintain a car’s performance. How does antifreeze work?

 

In this lesson you will learn about different types of intermolecular bonding forces and how they are believed to influence the properties of matter.

 

Essential Questions

  • What are intermolecular forces?
     

  • Are the differences between the melting and boiling points of similar substances explained by differences in their intermolecular forces?

  • How does scientific knowledge and theory develop through hypothesis, evidence collection, investigation, and explanation?

Module 2: Lesson 4 Assignment

 

Save a copy of the Module 2: Lesson 4 Assignment to your course folder. You will receive more information about how to complete the assignment later in the lesson.

 

You must decide what to do with the questions that are not marked by the teacher.

 

Remember that these questions provide you with the practice and feedback that you need to successfully complete this course. You should respond to all the questions and place those answers in your course folder.