How much energy is involved in chemical reactions?
Knowing the amount of energy involved in chemical reactions is useful so that resources are used efficiently and economically. It is possible to measure the amount of energy experimentally or to calculate it. Controlling the amount of energy intake in our diet is important in avoiding obesity. How do we identify and analyse substances? A range of chemical tests can be used for the detection and identification of elements and compounds. Instrumental methods that are quick, accurate and sensitive have been developed to identify and measure substances, often in very small samples. These methods are used to monitor products, our health, the environment and in forensic science.
