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Chemistry Lec > Electrochemistry > Flashcards

Electrochemistry Flashcards

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1
Q

Use of chemical reaction to make electricity

A

Electrochemistry

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2
Q

The loss of electron of certain atom.

A

Oxidation

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3
Q

The gain of electron of certain atom.

A

Reduction

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4
Q

Flow of electrons from one substance to another.

A

Redox reaction

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5
Q

2 places where Redox reaction take place.

A
  1. Galvanic cells

2. Electrolytic cells

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6
Q

It converts chemical energy to electrical energy using spontaneous reaction.

A

Galvanic cells

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7
Q

It converts electrical energy to chemical energy using non spontaneous reaction.

A

Electrolytic cells

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8
Q

The positive electrode in the galvanic cell

A

Cathode

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9
Q

Sum of the 2 half cells potentials using the standard cell potential values

A

EMF

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10
Q

Formula for the amount of electrical energy

A

nFE

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11
Q

Maximum amount of useful electrical work that can be obtained in reaction

A

Gibbs Free Energy

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12
Q

Formula for Gibbs free

A

-nFE

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13
Q

How to determine if equilibrium constant is spontaneous

A

Greater than 1

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14
Q

Formula for Equilibrium constant

A

nE (divided by) 0.0257

e ^k

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15
Q

What is the 2nd law of thermodynamics?

A

states that the entropy of the universe increases in a spontaneous process and remains unchanged in an equilibrium process.​

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16
Q

Number of ways to arrange the particles

A

Microstates

17
Q

Ways to increase the microstates

A
  1. Solid to Gas
  2. Temperature
  3. Increase of particles
  4. It is more of a solution than pure solute
18
Q

Formula for the entropy of the universe

A

Ssys + Ssurr

19
Q

Formula for the Entropy of the system

A

Sys = n(sum of product (S)) - n(Sum of reactant(s))

unit —-J/K mol

20
Q

Formula for the changes in entropy of the surr

A

Hsys = n(sum of Hf of product) -n(sum of Hf Reactant)

21
Q

Formula of Ssurr

A

-Hsys / 298K

22
Q

Ways to get Gibbs free energy

A

-nFE
n(summ of G) - n(Summ of g)
Hsys - ( T )Ssys

Chemistry Lec (3 decks)

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