1.8 Thermodynamics Flashcards Preview

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Flashcards in 1.8 Thermodynamics Deck (15):
1

Enthalpy of formation

energy change for formation of 1 mole of a substance from its constituents under standard states and conditions

2

Enthalpy of combustion

energy change for combustion of 1 mole of a substance into its oxides under standard states and conditions

3

Enthalpy of atomisation

energy change for 1 mole of gaseous atoms to be formed from its elements under standard states

4

Enthalpy of first ionisation

energy change to remove 1 election form each atom in the 1 mole of gaseous atoms to form 1 mole of gases ions

5

Enthalpy of electron affinity

energy change when 1 mole of gaseous atoms are converted to 2 mole of gaseous 1- ions to due addition of one mole of electrons

6

Enthalpy of lattice formation

energy change wen 1 mole of solid ionic compound is formed from its gaseous ions

7

Enthalpy of hydration

energy change when water molecules surround 1 mole of gaseous ions

8

Enthalpy of solution

energy change when 1 mole of solute dissolves completely in sufficient solvent to form a solution in which the molecules of ions are far enough apart to not interact

9

Entropy ∆Sø

measure of disorder of a chemical system

10

How to calculate Entropy

∆Sø = ∑S Products- ∑S reactants

11

What is Gibbs Free energy?

A balance between entropy and enthalpy

∆G = ∆H - T * ∆S

12

Why will a reaction not occur

a reaction will not occur is it has a large Ea or it is not feasible

13

When will a reaction be feasible?

∆G ≤ 0

At equilibrium ∆G= 0

14

What is the Born Hater Cycle?

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15

What is a solution Cycle?

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