Chemical energetics Flashcards

1
Q

Exothermic Reaction

A

It is a reaction where energy is released causing the reactants to be greater than the products. Reactants > Products

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2
Q

Endothermic Reaction

A

It is a reaction where energy is absorbed causing the reactants to be lesser than the products. Reactants < Products

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3
Q

Activation Energy

A

It is the minimum amount of energy required for a reaction to take place

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4
Q

Bond breaking

A

The process of bond breaking is an endothermic process. Energy must be absorbed to break bonds apart.

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5
Q

Bond making

A

The process of bond making is an exothermic process. Energy (heat) is released when this happens.

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6
Q

Advantages of hydrogen as a fuel

A

Very energy rich
No pollutants are formed
Nitrogen oxides not formed (these are environmentally harmful i.e. acid rain)

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7
Q

Disadvantages of hydrogen as a fuel

A

Expensive to produce
Difficult (and expensive) to store

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8
Q

Formation is what type of reaction

A

Exothermic

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9
Q

Enthalpy

A

Energy stored in bonds

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