Energy changes and Reversible reactions Flashcards

1
Q

Exothermic

A

A reaction that gives out heat

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2
Q

Endothermic

A

A reaction that takes in heat

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3
Q

Is breaking bonds exo/endothermic?

A

Endothermic

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4
Q

Is making bonds exo/endothermic?

A

Exothermic

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5
Q

Examples of exothermic

A

Burning
Neutralisation reactions
Acid + metal

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6
Q

Exothermic change diagram

A

Reactants have more energy than products

Heat evolved is the difference between Reactant/product

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7
Q

Exothermic deltaH

A

Negative number, losing heat

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8
Q

What doe deltaH mean

A

Change in enthalpy

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9
Q

Endothermic change diagram

A

Reactants lower than the products heat absorbed the difference

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10
Q

Thermal decomposition

A

Endothermic

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11
Q

La Chatelier’s Principle

A

If the dynamic equilibrium is disturbed by changing the conditions the reaction moves the counteract the change.

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12
Q

Dynamic Equilibrium

A

Constant amounts of a continuing reaction

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13
Q

Increasing the temperature

A

Favours Endothermic reaction

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14
Q

Decreasing the temperature

A

Favours Exothermic reaction

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15
Q

Rate of forward reaction is

A

equal to the backwards reaction

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16
Q

Changes in pressure

A

Changes in pressure don’t affect the position of equilibrium, if the number of moles on both sides of the equation are equal

17
Q

Adding catalyst

A

Reduces the times taken, but does’t change the position of the equilibrium.