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chem 1050 mid term
Definitions for enthalpies
7
Chemistry
Undergraduate 1
02/26/2010

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Term

Bond Enthalpy

(deff)

Definition

How much engery in bond; how much engery needed to break bond in GAS faze in mol.

always +

Term
Bond enthalpy increases, distance between bonds gets _______
Definition
closer
Term
calculating ▲Hfor bond enthalpy:
Definition
react - prod
Term

Lattice Enthalpy

(deff)

Definition

reaction where ionic solid is broken appart into its constituent ions (gas phase).

▲H always + (thus endothermic reaction)

Term
ionization enthalpy
Definition

energy needed to pluck ion out of compound

+▲H

Term
electron gain enthalpy
Definition
energy released when gaseous attom accpets electron
Term
Solvation Enthalpy
Definition
value assigned to all other ions from arbitrary ion's value for ▲Hform
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