2.5 Endothermic And Exothermic Reactions Flashcards

1
Q

What is an endothermic reaction?

A

A reaction were heat is taken from the surroundings

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2
Q

Give an example of an endothermic reaction

A

Thermal decomposition of calcium carbonbate

Ammonium nitrate dissolving in water

Ethanoic acid reacting with sodium carbonate.

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3
Q

How can energy change be monitored?

A

You record the temperature at regular intervals. Also you measure the mass of the product at the beginning and end of the reaction.

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4
Q

What is an exothermic reaction?

A

A chemical reaction which releases energy by heat or light to the surroundings.

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5
Q

Explain how energy change in a reaction can be monitored.

A

Recording the temperature at regular intervals. Measuring the mass of the reactants and products at the beginning and end of the reaction.

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6
Q

Where is energy transfered in an exothermic reaction?

A

To the surrounding area

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7
Q

Name an example of an exothermic reaction.

A

Combustion (burning)

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8
Q

Name another example of an exothermic reaction.

A

Many oxidation reactions e.g. Rusting

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9
Q

And another example of exothermic reactions.

A

Neutralisation reactions between acids and alkalis.

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10
Q

How is an exothermic reaction defined?

A

A reaction transferring energy to the surroundings.

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11
Q

What kind of heat flow is exothermic an example of?Positive or negative heat flow

A

Negative heat flow.

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12
Q

Exothermic reactions can occur spontaneously.True or false.

A

True!

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13
Q

A reaction can be both exothermic and endothermic.True or false.

A

False.

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14
Q

Name another example of an exothermic reaction.

A

Many oxidation reactions e.g. Rusting

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