Rate of Reaction PDF

Rate of reaction Making chemical reactions happen faster THere are a number of different things what we can change to make a chemical reaction faster. We need to understand the concept of collision theory, and how it can be used to explain the effect of 5 different factors on the rate of a chemical...

Rate of reaction Making chemical reactions happen faster THere are a number of different things what we can change to make a chemical reaction faster. We need to understand the concept of collision theory, and how it can be used to explain the effect of 5 different factors on the rate of a chemical reaction. Collision Theory Concentration Temperature Surface Area Pressure Use a catalyst How many ways can a scientist speed up a chemical reaction? What are the two characteristics that two molecules must have to react with each other? - In the right orientation - Sufficient energy to collide with each other Identify each of the ways a scientist can speed up a chemical reaction and how it speeds up the reaction. Increase the concentration - by increasing concentration there are more particles to react and hence increased frequency between particles Increase the pressure - increases the frequency of particle collisions Increase the surface area - more particles are exposed resulting in more collisions Increase the temperature - particles have more kinetic energy which result in them moving faster and increasing the frequency of collisions Use a catalyst - provides an alternate pathway hence less energy required to activate the reaction How would you slow down reactions? Decrease the concentration Decrease the pressure Decrease the surface area Decrease the temperature Don’t use a catalyst