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Unit 5 Chemistry > Enthalpy Change > Flashcards

Enthalpy Change Flashcards

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1
Q

What is the enthalpy change of a reaction

A

when 1 mole of a compound is formed from its constituent elements in standard state which is 25 degrees/298 kelvin

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2
Q

What is a bond enthalpy

A

Energy required to break or make a bond

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3
Q

What factors effects wether the enthalpy is positive

Or negative

A

If there is more energy required to break bonds in the reaction then the enthalpy is positive if more energy is required to make bonds then its negative

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4
Q

what is the enthalpy change of combustion

A

when 1 mole of a compound burns completely in oxygen in its standard state under standard conditions

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5
Q

how do you calculate the enthalpy change of formation and combustion reaction

A

products- reactants

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6
Q

what is the enthalpy change of a compound

A

elements - compound

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7
Q

what is the enthalpy change of formation using combustion values

A

elements - compound

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Unit 5 Chemistry (20 decks)

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