Lecture 4 - Born-Haber Cycles Flashcards Preview

FY YEAR: Physical And Inorganic Chemistry > Lecture 4 - Born-Haber Cycles > Flashcards

Flashcards in Lecture 4 - Born-Haber Cycles Deck (13)
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1

what does a born-haver cycle show?

the enthalpy changes that occur when an ionic lattice is formed

2

arrows going up show?

endothermic process

3

arrows got down show?

exothermic process

4

define enthalpy of lattice dissociation

the enthalpy change when one mole of an ionic compound is separated into its constituent gaseous ions

5

define Enthalpy of lattice formation

the enthalpy change when one mole of an ionic compound is formed from its constituent gaseous ions

6

what are the 2 factors that affect lattice enthalpy

1.charge of the jones, higher charge more attracted to eachother
2.radius of the ions, smaller ions packed in lattice closely so are more attracted to each other

7

whats Enthalpy of formation, ΔfHo?

The enthalpy change when 1 mole of a compound is formed from its constituent elements with all reactants and products in standard states under standard conditions

8

whats Ionisation enthalpy, ΔIEHo?

The first ionisation enthalpy is the enthalpy change when one electron is removed from one mole of gaseous atoms to form one mole of gaseous ions with a 1+ charge

9

whats Enthalpy of atomisation, ΔatHo?

The enthalpy change for the formation of one mole of gaseous atoms from the element in its standard state

10

whats Enthalpy of vaporisation, ΔvapHo?

The enthalpy change for the vaporisation of a liquid substance into a gas

11

whats Bond dissociation enthalpy, ΔdissHo?

The enthalpy change when one mole of a covalent bond is broken under standard conditions in the gaseous state

12

whats the bond dissociation enthalpy of a diatomic element ?

twice the value for the enthalpy of atomisation of that element

13

whats Electron affinity, ΔeaHo?

The enthalpy change when one electron is added to one mole of gaseous atoms to form one mole of gaseous ions with a 1- charge