factors affect rate of reaction
- Created by: Oyinda14
- Created on: 02-06-18 15:59
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- Factors affecting rate of reaction
- Rate of reaction depends depends on 4 things
- Temperature
- If they move faster they will collide more
- The faster they move the more energy, so more of the collisions will have enough energy to make reaction happen
- When temperature is increased particles move faster
- Surface area
- If one of reactants is a solid, then breaking it up into smaller pieces increases its surface area:volume ratio
- This means for same volume of solid, particles around it have more area to work on so collisions will be more frequent
- If one of reactants is a solid, then breaking it up into smaller pieces increases its surface area:volume ratio
- Presence of catalyst
- A catalyst is a substance that speeds up reactions
- Different catalysts are needed for different reactions
- They all work by decreasing activation energy needed for reaction to occur
- Enzymes are biological catalysts - catalyst reactions in living things
- They provide an alternative reaction pathway with lower activation enrgy
- pressure of gas/concentration of solution
- If solution is more concentrated, more particles knocking about in same volume
- So collisions between reactants are more frequent
- when gas pressure increases, same number of particles fill a smaller space
- If solution is more concentrated, more particles knocking about in same volume
- Temperature
- Rate of reaction depends depends on 4 things
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