Energy Change And Rates Of Reaction Flashcards

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1
Q

Heat of reaction ( Δ H)

A

The net change of chemical potential energy of the system

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2
Q

Exothermic reaction

A

Reactions which transform chemical potential energy to thermal energy

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3
Q

Endothermic reactions

A

Reactions which transform thermal energy into chemical potential energy

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4
Q

Activation energy

A

The minimum energy required to start a chemical reaction

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5
Q

Activated complex

A

A high energy, unstable, temporary transition state between the reactants and products

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6
Q

Reaction rate

A

Change in concentration per unit time of either a reactant or product

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7
Q

Catalyst

A

Substance that increases the rate of the reaction but remains unchanged at the end of the reaction

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