Rates and Energy

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  • Created by: Sam Evans
  • Created on: 06-01-15 20:12
Pieces of zinc react with dilute hydrochloric acid: Zn(s) + 2Hcl(aq) -> ZnCl2(aq) + H2 (g). In what ways could you increase the rate of reaction between zinc and hydrochloric acid?
Increase in concentration of acid, increase temperature, use powdered zinc, use a catalyst
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How can you find the rate of reaction from a graph of mass of product against time?
From the gradient or slope of the line
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What isthmian by the 'activation energy' of a reaction?
The minimum energy that particles must've for collisions to produce a reaction
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Name two types of reaction that are exothermic
combustion and neutralisation
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Why must calcium carbonate be heated continuously to convert into calcium oxide and carbon dioxide?
(Thermal decomposition is) an endothermic reaction
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Nitrogen and oxygen react together to produce nitrogen oxide: N2 (g) + O2 (g) -> 2NO (g). What changes in conditions would increase the rate of this reaction?
High temperature, high pressure, catalyst
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Explain in terms of particles why increasing the concentration of a reaction increases the rate of the reaction
Particles are closer together (more particles in the same volume), so collisions are more frequent (more collisions per second)
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Explain why increasing the temperature increases the rate of reaction
Particles collide more frequently, and with more energy so more collisions have the activation energy (minimum energy needed for reaction)
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Other cards in this set

Card 2

Front

How can you find the rate of reaction from a graph of mass of product against time?

Back

From the gradient or slope of the line

Card 3

Front

What isthmian by the 'activation energy' of a reaction?

Back

Preview of the front of card 3

Card 4

Front

Name two types of reaction that are exothermic

Back

Preview of the front of card 4

Card 5

Front

Why must calcium carbonate be heated continuously to convert into calcium oxide and carbon dioxide?

Back

Preview of the front of card 5
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