Enthalpys Flashcards

1
Q

What is enthalpy of formation

A

Energy chage when forming one mole a substance using its element constituants

E.g C + O2 –> CO2

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2
Q

What are the standard conditions

A

298K (25C)
100KPa
1 mol/dm3

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3
Q

What is Hess Law

A

using enthalpy of formations to find enthalpy of reaction

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4
Q

If using combustion which way to arrows do in Hess law

A

DOWN to HELLLLL (Fire)

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5
Q

Definition of enthalpy of neutralisation

A

Energy change when an acid and base react forming one mole of H2O

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6
Q

When should you round an answer

A

ONLY AT THE END OF THE QUESTION

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7
Q

When doing bond enthalpy how do u do the final calc

A

React - Produc

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8
Q

Limitations of bond enthalpys

A

Its the average of the bond in different chemical enviroments not that specific bond so not exact

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9
Q

Definition of enthalpy of combustion

A

Energy needed to completely react one mole of something with O2

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10
Q

How to convert C to K

A

+273 on

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11
Q

Unit for Enthalpys?

A

KJ/Mol

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12
Q
A
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