Lecture 5 Application Flashcards
example of a permeable membrane
two containers separated by a membrane permeable to one of the ions
K+ and Cl-
K+ permeable
equation for membrane potential
RT/zF ln [M+] outside/[M+] inside
what cells have permeable membranes famously biology
nerve cells
what ions are controlled concentration of in nerve cells
K+
Na+
Cl-
what is membrane potential
different concentrations of ions inside and outside the cell
what are cell membranes made of
lipid bilayers
and acid head and alkane tail
ion channels by special proteins
applications of electrochemistry
electrolysis
batteries
what is electrolysis
electrical energy supplied to drive chemical reactions
difference between electrolysis cells and electrochemical cells
the anode and cathode are switched signs
in an electrolysis cell is the anode doing oxidation or reduction
oxidation
in electrolysis cell is the cathode doing oxidation or reduction
reduction
advantages of H2 fuel
not a fossil fuel
energy is higher in combustion than for hydrocarbons
no CO2 produced during combustion
disadvantages of H2 fuel
safety - danger of explosion
storage of H2 - low temp or metal hydrides heavy
what is a battery for
storing chemical energy by converting it to electrical energy
pros of lithium ion batteries
cheap ad efficient
