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electrochemistry
concepts for lecture test
13
Chemistry
Undergraduate 1
03/02/2013

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Cards

Term
which electrochemical cell generates energy?
Definition
galvanic
Term
which electrochemical cell is nonspontaneous? what does it need to become spontaneous?
Definition

electrolytic cells (have +ΔS)

 

an eletric current can be passed through the solution

Term
which electrochemical cell is spontaneous?
Definition
galvanic (ΔS is -)
Term

Despite the cell type,

reduction always occurs at the _______

oxidation always occurs at the _______

 
Definition

cathode

anode (a =without

= e- are leaving)

Term

For a galavanic cell the

anode  is _____

cathode is _____

(positive, negative)

Definition

anode: negative

(this where the e- are located, and they travel 

anode→cathode)

 

cathode: positive

Term

For a electrolytic cell the

anode  is _____

cathode is _____

(positive, negative)

Definition

anode: positive

cathode: negative

Term
Despite the cell type ,electrons always flow from ____ to ____
Definition
anode→ cathode
Term
the cell potential for a galavanic cell must be
Definition

greater than zero

(positive)

Term
the cell potential for a electrolytic cell must be
Definition
negative
Term

how do you calculate the cell potential?

(despite cell type)

Definition
E cell= E cathode- E anode
Term
for an electrochemical cell, eletron flow creates
Definition
a cell potential
Term
what 2 effects occur if electron flow stops?
Definition

1. cell potential is ZERO

2. system at equilibrium

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