C2-rates and energy

how fast

• rate of the reaction is the speed of the reaction
• it can be found by measuring how much reactant is used or by how much product is formed (and by measuring the time for these two to happen)
• rate of reaction=amound of reactant used/time OR amount of product found/time
• can also measure the time taken for solids to form in solutions or gases to be given off
• rate of reaction can be found by the gradient on a graph- steeper=faster

collision theory and surface area

• reactions can only happen if particles collide but thats not enough- the particles must collide with enough energy and force to reach the activation energy and change into new substances
• factors that enhance collisions:
• temp
• concentration
• pressure
• surface area of solids- breaking large pieces of a solid into smaller pieces exposes new surfaces so more collisions can occur
• catalysts

effect of temperature

• increases the kinetic energy of the particles so they move faster and collide more often
• they collide with more energy so more collisions are sucessful
• temp rise…