C5 - Energy Changes

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What are some common exothermic reactions?

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1

What are some common exothermic reactions?

Combustion, Oxidation, Neutralisation

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2

What are reaction profiles?

Diagrams that show the relative energies of the reactants and products in a reaction, and how the energy changes over the course of the reaction

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3

What are bond energies?

The energy needed to break 1 mol of a particular covalent bond

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4

What type of process is breaking bonds?

endothermic as it requires energy from its surroundings to break these bonds

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5

In Chemicals where is energy stored?

In their bonds

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6

What is the relationship between different chemicals and energy?

Different Chemicals hold different amounts of energy in their bonds

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7

How is energy most commonly released into its surroundings?

Heat

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8

What is an exothermic reaction?

A reaction where energy is transferred to its surroundings.

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9

What is an endothermic reaction?

a reaction where energy is absorbed from its surroundings

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10

What is activation energy?

minimum amount of energy needed for the reactant particles to collide with each other and react

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11

What type of energy is commonly taken in from its surroundings?

Heat Energy

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12

What type of process is forming bonds?

exothermic as energy is released when bonds are formed

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13

every chemical bond has a particular bond energy associated with it

what can these bond energies be used for?

to calculate the overall energy change in a reaction and determine if a reaction is endothermic or exothermic?

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14

How do you find out bond energies?

They will be given to you

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15

What are bond energies measured in?

kJ/mol

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