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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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how do you salts, neutralisation, displacement and precipitation reaction, and an extra thermic reaction is |
Back (Definition) |
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How does an exothermic change your reaction open and what properties does it have? |
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describe an endothermic, change your reaction as one in which heat energy is taken in |
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what happened to the of bonds? In Endo and exothermic reactions. |
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Calculate the energy change in a reaction, given the energies and bonds |
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What is the formula for energy change? |
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What does the term activation energy mean? |
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What does an exothermic reaction profile look like? |
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describe an exothermic reaction profile diagram |
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What does an endothermic reaction profile look like? |
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Describe an endothermic reaction profile |
7.16 Draw and label reaction profiles for endothermic and exothermic reactions, identifying activation energy • Reaction profiles can be used to show the relative energies of reactants and products, the activation energy and the overall energy change of a reaction.
• for the endothermic diagram, the reactants have less energy than the products, because the energy has been taken in from the surroundings |
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explain the core practical investigating the effect of changing the conditions of a reaction on rate of chemical reactions by measuring the production of gas and change of colour |
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in these experiments, you are investigating the effect on rate of changing the size of the marble chips (smaller chips=larger surface area= faster rate) and also the effect of changing the concentration of hydrochloric acid (greater concentration= greater number of particles in a given volume= faster rate) - Freqvency. 2 Suggest practical methods for determining the rate of a given reaction cel |
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Explain or suggest a practical method for determining the rate of a given reaction |
Rates of reactions can be measured using the amount of product used, or amount of product formed over time: Rate of reaction = amount of reactant used Time |
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Part two |
Rate of reaction = amount of product formed Time o Quantity of reactant or product can be measured by the mass in grams or by a volume in cm? o Units of rate of reaction may be given as g/s or cm≥/ to measure reactant used: if the product is a gas, which will be given off, you can carry out the reaction on a set of weighing scales and measure how much mass is lost o to measure product formed: if the product is a gas, you can measure the volume of gas produced in a gas syringe |
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explain her reaction is occurring particles, collide and the rate of reaction increase in frequency and energy of collisions increased |
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It’s mainly affects on rates of reaction of changes in temperature concentrations of area to volume ratio |
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The product of the reaction, how do you expect the mass volume and concentration to look for me? how do you expect the reactant to be as well |
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What is a catalyst? |
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Explain how the addition of a catalyst increases the rate of reaction in terms of activation energy |
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What is a biological catalyst? and an example of one and what it is useful for |
Enzymes act as catalysts in biological systems Yeast is the enzyme used in the production of ethanol as it is fermented from sugars, ethanol is in alcoholic drinks |
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