In this first content lecture in Part 3, Organic and Physical Chemistry, we look at what we mean by the term 'organic' as applied to chemical compounds. We then go on to look at where these organic chemicals naturally come from, and then we turn our attention to the simplest organic group, the alkanes.

00:00  Introduction

00:20  What is organic chemistry?

01:32  Where do organic compounds come from?

09:38  The Alkanes

15:48  Combustion of Alkanes

17:21  Substitution reactions

In this lecture we first of all recap on what we mean by 'organic chemistry' and the group known as the Alkanes. Alkanes are described as 'saturated hydrocarbons' and in this lecture we introduce a group of 'unsaturated hydrocarbons' known as the Alkenes. Having looked at the properties of the Alkenes we then move on to the Alcohol group, as exemplified by Ethanol.

00:00  Introduction and recap

03:05  Formula and structure of Alkenes

06:10  Chemical properties of Alkenes

09:20  Ethanol

10:30  Manufacture of Ethanol

15:45  Uses of Ethanol

16:40  Dehydration of Ethanol

In this lesson we start looking at Physical Chemistry. After a brief recap on the pH scale we consider the common acids and alkalis, and how salts are formed. We investigate the reactions of salts and then complete the lesson with a summary of three ways in which salts might be prepared.

00:00  Introduction, the pH scale

04:01  Common acids and alkalis

04:52  Salt formation

06:53  Reactions of salts

13:00  Preparing soluble salts from acids

14.42  Preparing insoluble salts using precipitation reactions

16:02  Acid- Alkali titrations

This lesson is concerned with the energy changes that take place during chemical reactions. I start the lesson off with a warning - it's not going to be easy! There are calculations involved, and you will need to take your time and ensure that you follow everything. If not, pause the video, go back and repeat sections as many times as possible until you have it clear in your mind. Good luck!

00:00  Introduction

00:40  Exothermic and Endothermic reactions

05:50  Calculating enthalpy changes

16:37  Making and breaking bonds

In this lesson we begin by considering just what we mean by the term 'rate of reaction'. A number of factors can affect the rate of reaction, and we go on to consider each one in turn. Activation energy is then described, and we complete the lesson with a look at classic rate of reaction experiments.

00:00  Introduction

00:22  What is the 'rate of reaction'?

03:05  Factors affecting the rate of reaction

08:30  Activation energy

09:55 Rate of reaction experiments

The final lesson in this course covers the topic of reversible reactions. We begin by defining what we exactly mean by the term 'reversible reaction', and two examples are given to help make the idea clearer. We then go on to look at the concept of a 'closed system' and the impact this will have on reversible reactions.

00:00  Introduction

00:20  What is a 'reversible reaction'?

01:45  Example of a reversible reaction (1)

03:15  Example of a reversible reaction (2)

05:05  Reversible reactions and closed systems