book!! Flashcards
what interconversion does it electrochemistry deal with
interconversion of electrical energy and chemical energy
how do electrical effects occur
due to the movement of electrical charge
either ions in solution or electrons in a conductor
electrical current definition
the rate at which a charge passes a point
symbol for electrical current
I
symbol for current
A (amperes)
what must be present for an electrical current to flow between 2 points in a circuit
potential difference (VOLTAGE) between the 2 points
what is the potential difference
the driving force that pushes electrons // ions around the circuit
what is potential difference measured in
Volts
V
what law relates current and potential difference
ohms law
V = I x R
what is R in ohms law
the resistance of the material that the current is flowing through
what is resistance measured in
measured in ohms
what does a higher resistance mean
it means it’s harder for the charge to flow through the material
how does current affect voltage in an electrochemical cell
a high current leads to a loss in voltage??
as the reactants are used up
how does a large resistance affect current and voltage
a larger resistance decreases current and voltage.
voltage doesn’t decrease as fast tho!!
high current means
voltage falls quick
reactants are used up fast
