Chemistry at Maastricht University | Flashcards & Summaries

Lernmaterialien für Chemistry an der Maastricht University

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Electrolysis

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Uses electrical energy to create chemical change (e.q. to refine metals or recharge batteries)

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Hess Law

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Reaction enthalpies can be added.

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Spontaneous reactions

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They occur without the constant application of energy and can be endothermic or exothermic.

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2nd la of thermodynamics (chem)

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Entropy increases with every spontaneous reaction.

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Potential in galvanic cells

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E°cell is the electric potential of a galvanic cell measured against the SHE. The resulting potentials can be used to calculate the overall potential of two galvanic cells combined: 

E°cell = oxidation potential + reduction potential

or 

E°cell = E°cathode - E°anode

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What is VBT?

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​Valence Bond Theory states, that bonds are formed by overlapping orbitals with one electron in them. They create a shared orbital, either sigma or pi.

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Exothermic reaction

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The system loses heat. The sign is negative.

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First law of Thermodynamics (Chem)

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The total energy of the universe is constant.

The total energy is the sum of kinetic and potential energy.

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Rules of Heat

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- moves from high to low heat

- moves towards equilibrium 

- moves spontaneously

- requires work to go from low to high heat

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Calculation total energy

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∆E = Eproducts - Ereactants

∆E = q + w

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Specific Heat capacity

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q = C ⋅ m ⋅ ΔT

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Types of Calorimetry

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Constant pressure calorimetry - open system, volume can change but only done with solids or solutions.


Constant volume calorimetry - closed system, work is zero, and changes in energy come in a change of heat.

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Beispielhafte Karteikarten für deinen Chemistry Kurs an der Maastricht University - von Kommilitonen auf StudySmarter erstellt!

Q:

Electrolysis

A:

Uses electrical energy to create chemical change (e.q. to refine metals or recharge batteries)

Q:

Hess Law

A:

Reaction enthalpies can be added.

Q:

Spontaneous reactions

A:

They occur without the constant application of energy and can be endothermic or exothermic.

Q:

2nd la of thermodynamics (chem)

A:

Entropy increases with every spontaneous reaction.

Q:

Potential in galvanic cells

A:

E°cell is the electric potential of a galvanic cell measured against the SHE. The resulting potentials can be used to calculate the overall potential of two galvanic cells combined: 

E°cell = oxidation potential + reduction potential

or 

E°cell = E°cathode - E°anode

Mehr Karteikarten anzeigen
Q:

What is VBT?

A:

​Valence Bond Theory states, that bonds are formed by overlapping orbitals with one electron in them. They create a shared orbital, either sigma or pi.

Q:

Exothermic reaction

A:

The system loses heat. The sign is negative.

Q:

First law of Thermodynamics (Chem)

A:

The total energy of the universe is constant.

The total energy is the sum of kinetic and potential energy.

Q:

Rules of Heat

A:

- moves from high to low heat

- moves towards equilibrium 

- moves spontaneously

- requires work to go from low to high heat

Q:

Calculation total energy

A:

∆E = Eproducts - Ereactants

∆E = q + w

Q:

Specific Heat capacity

A:

q = C ⋅ m ⋅ ΔT

Q:

Types of Calorimetry

A:

Constant pressure calorimetry - open system, volume can change but only done with solids or solutions.


Constant volume calorimetry - closed system, work is zero, and changes in energy come in a change of heat.

Chemistry

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