Unit 5 Electrochem, Half-Lives, & Entropy Flashcards
what happens when a molecule is being reduced?
a gain of electrons, oxidation number goes down (R.I.G)
what happens when a molecule is oxidized?
a loss of electrons, oxidation number goes up (O.I.L)
what is oxygen’s oxidation number?
-2
what is the oxidation number of diatomic ions?
0
when balancing half reactions with respect to charge, where does the charge go for oxidizing reactions?
on the right
when balancing half reactions with respect to charge, where does the charge go for reduction reactions?
on the left
what is the order of the the states of matter by most ordered to least ordered (spontaneity)
solid(most ordered), liquid, gas (least ordered)
in regards to moles of gas, when is delta s positive?
when the number of moles increases
when is delta g (gibbs free energy) nonspontaneous?
when g>0
when is delta g (gibbs free energy) spontaneous?
when g<0
what does an alpha particle look like?
He⁴₂
what does a beta particle look like?
e⁰-₁
how does beta decay impact Z?
increases by one
how does positron emission impact A and Z?
A stays the same Z decreases by one
where does oxidation take place in an electrochemical cell?
anode
