C5- Energy chnages

  • Created by: Popping
  • Created on: 04-01-18 09:37
What is a exothermic reaction?
An exothermic reaction is one which transfers energy to the surrondings , usually by heating.
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Give an example of an exothermic reaction?
Combustion
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What is a neutrallistion reaction?
exothermic
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What is a endothermic reaction ?
An endothermic reaction is one which takes in energy from the surrondings
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What are reaction profiles ?
Reaction Profiles are diagrams that show the reaction energies of the reactants ancd products in a reaction and how the energy changes over the course of the reaction.
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What do you have to do for this required practical?
You measure the amount of energy released by a chemical reaction (in soultion) by taking the temperature of the regengts , mixingthem in a polystyrene cup and measuring the temperature of the solution at the end of the reaction/
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What two chemicals do you use for the practical?
Hydrochloric acid & sodium hydroxide
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What type of reaction must the enrgy be supplied to break the existing bonds ?
Endotrmic
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What happens during a chemical reaction?
Old bonds are broken and new bonds are formed
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How do you calcualte the energy change in a reaction?
in - out reactants - products
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Other cards in this set

Card 2

Front

Give an example of an exothermic reaction?

Back

Combustion

Card 3

Front

What is a neutrallistion reaction?

Back

Preview of the front of card 3

Card 4

Front

What is a endothermic reaction ?

Back

Preview of the front of card 4

Card 5

Front

What are reaction profiles ?

Back

Preview of the front of card 5
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