Flashcards
Chemisty - Rate and Ectent of Chemical Change
Cards in this deck (22)
- 1Rate of ReactionHow fast the reactants are changed into products.
- 2Speeding up reactions1. increasing pressure and concentration
2. increasing surface area
3. increasing temperature
4. the presence of a catalyst - 3Working out the rate of reaction1. How quickly the reactants were used to make the products
2. How quickly products of the reactants are made - 4Calculating the rate of reactionFinding the gradient of a graph for a specific point
Change in Y / Change in X - 5Measuring the rate of reaction1. Mass of the reaction
2. Gas of the reaction
3. Transparency (light) of the reaction - 6Mean rate of the reaction1. Quantity of reactants used / time
2. Quantity of products formed / time - 7Collision theoryWhen particles collide into one another with enough energy a reaction could take place.
- 8Activation energyThe minimum amount of energy needed for a reaction
- 9Surface area1. Smaller Volumes reactants are much more exposed and react much quicker
2. Surface area : Volume
3. Smaller the size the larger surface area.
4. A larger surface area would be a quicker reaction - 10Temperature1. Higher temperature increases the rate of reaction
2. Particles collide more often and with more energy - 11Concentration and Pressure1. More concentration increases the rate of reaction due to more particles moving in the same volume of concentration
2. Higher pressure increases the rate of reaction due to gas particles being squished closer - 12A Catalyst1. A catalyst is not used up and can be repeatedly used.
2. It increases the minimum energy a reaction can have meaning its more likely for a reaction to take place. - 13Advantages of a Catalyst1. Cheaper
2. Similar effect as a higher temperature and / or pressure
3. They help the environment - 14Reversible reactions1. The reactants can be used to make products
2. The products can be used to make the reactants - 15Reversible Reaction EXAMPLEAmmonium Chloride -><- Ammonia + Hydrogen Chloride
- 16Endothermic1. A reaction that TRANSFERS energy to the surroundings
2. From reactants to products - 17Exothermic1. A reaction that TAKES IN energy from surroundings
2. From products to reactants. - 18Dynamic equilibrium1. Reactants only at the start of reaction
2. Rate of reactants is much greater than products
3. Rate of products increases and rate of reactants slow down
4. Eventually the rates are equal - 19Closed System1. No reactants or products can escape from the container
- 20Equilibrium1. The rate of the forwards reaction equals to the reverse reaction
- 21Altering Conditions - Forward Reactions (More molecules of gas)1. Which increases in pressure and decreases the amount of products formed
2. Which decreases in pressure and increases the amount of products formed - 22Altering Conditions - Forwards Reactions (Less molecules of gas)1. Which increases in pressure and increases the amount of products formed
2. Which decreases in pressure and decreases the amount of products formed
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- GCSE Chemistry Flashcards on Chemisty - Rate and Ectent of Chemical Change, created by Savannah Ferguson on 30/10/2017.
- Created by
- Savannah Ferguson · Oct 2017
- Updated
- Oct 30, 2017
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