topic 4

exothermic reaction

A chemical reaction that RELEASES energy as a product

endothermic reaction

A reaction that ABSORBS energy in the form of heat

difference between epo and exothermic reactions and the relationship between reactants ans and products in each

An endothermic reaction is one that needs to be supplied with heat. Endothermic reactions are like an opposite of an exothermic reaction. Instead of liberating heat, it absorbs it. One example of this reaction is like cooking an egg. You must bring in heat from the environment to allow your food to cook. Another way the two reactions differ is because the energy content of the reactants is fewer than the products, unlike an exothermic reaction. An exothermic reaction is one that causes heat. When two substances are mixed or brought together and it generates heat, that is classified as an exothermic reaction. In some exothermic reactions, heat is needed to begin the process, but then it will proceed by itself. In this process, the energy content of the products is more than the reactants. An example of this reaction is a fireplace, it releases heat from its burning logs.

Active site

Area on an enzyme molecule where reactions will happen Substrates are attached to active site of enzyme; thus increasing the chance of substrates end active sites getting together

Enzyme team work

Enzymes typically work in teams ➡ the product from one enzyme , substrate complex rxn becomes the substrate for the next enzyme - substrate rxn Ez. Digest of starch

Enzyme function models

Lock and key: The substrate matches the enzymes active site Induced fit : enzymes shape conforms to the shape of the substrate causing both a.s and substrates to 🔼shape

Enzyme function

Us related directly to enzyme structure (shape)