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thermodynamics > definitions > Flashcards

definitions Flashcards

1
Q

enthalpy of formation

A

the enthalpy change when 1 mole of a substance is made from its consistuent elements with all substances in their standard states

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2
Q

enthalpy of formation endo or exo ?

A

exo

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3
Q

enthalpy of combustion ?

A

the enthalpy change when 1 mole of a substance fully reacts with oxygen with all substances in their standard states under standard conditions

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4
Q

enthalpy of combustion endo or exo ?

A

exo

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5
Q

enthalpy of neutralisation ?

A

the enthalpy change when1 mole of water is formed in a reaction between an alkali and an acid under standard conditions

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6
Q

neutralisation exo or endo ?

A

exo

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7
Q

ionisation enthalpy ? 1st ?

A

enthalpy change when each atom in one mole of gaseous atoms loses 1 electron to form 1 mole of gaseous 1+ ions

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8
Q

ionisation enthalpy endo or exo ?

A

endo

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9
Q

electron affinity ? 1st ?

A

enthalpy change when each atom in 1 mole of gaseous atoms gains 1 electron to form 1 mole of gaseous 1- ions

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10
Q

second electron affinity ?

A

the enthalpy change when each ion in one mole of gaseous 1- ions gains one electron to form one mole of gaseous 2- ions

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11
Q

1st electron affinity endo or exo ?

A

exo

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12
Q

2nd electron affinity endo or exo ?

A

endo

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13
Q

enthalpy of atomisation ?

A

the enthalpy change when 1 mole of gaseous atoms is produced from an element in its sandard state

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14
Q

atomisation endo or exo ?

A

endo

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15
Q

hydration enthalpy ?

A

enthalpy change when 1 mole of gaseous ions became hydrated
(dissolved in water)

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16
Q

hydration enthalpy endo or exo ?

A

exo

17
Q

enthalpy of solution ?

A

enthalpy change when 1 mole of an ionic solid dissolves in an amount of water large enough so that the dissolved ions are well separated and do not interact with eachother

18
Q

enthalpy of solution endo or exo ?

A

varies

19
Q

bond dissociation enthalpy ?

A

enthalpy change when 1 mole of covalent bonds are broken in the gaseous state

20
Q

bond dissociation enthalpy exo or endo ?

A

endo

21
Q

lattice enthalpy of formation ?

A

enthalpy change when one mole of a solid ionic compound is formed from its consistuent ions in the gas phase

22
Q

lattice enthalpy of formation exo or endo ?

A

exo

23
Q

lattice enthalpy of dissociation ?

A

the enthalpy change when 1 mole of a solid ionic compound is broken up into its constituent ions in the gas phase

24
Q

lattice enthalpy of dissociation exo or endo ?

A

endo

25
Q

enthalpy of vaporisation ?

A

enthalpy change when 1 mole of a liquid is turned into a gas

26
Q

vaporisation endo or exo ?

A

endo

27
Q

enthalpy of fusion ?

A

the enthalpy change when 1 mole of a solid is turned into a liquid

28
Q

fusion exo or endo ?

A

endo

thermodynamics (1 decks)

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