1)Chemically, what takes place when a car battery is discharged and recharged? W
ID: 969399 • Letter: 1
Question
1)Chemically, what takes place when a car battery is discharged and recharged? What other power sources transfer power through chemical reactions? Provide a brief description of how power is created.
2)Boyle's law states that if the pressure increases, then the volume would decrease for a gas in a cylinder at constant temperature. Let's say the pressure is 760 torr and the volume is 2.4 L for a gas. If we increase the pressure of this gas in a cylinder by compressing the cylinder so that the inside gas would now have a pressure of 1520 Torr, what would the volume of this gas be?
3) What are the oxidation states of the aluminum in this equation? (Both the aluminum on the reactant side and the product side.)
Al --> Al3+ + 3e-
What are the oxidation states of the oxygen in this equation? (Both the aluminum on the reactant side and the product side.)
O2 + 4e- --> 2O2-
Explanation / Answer
2.
According to Boyle’s law
P1V1=P2V2
V2 = V1 P1/P2 = 2.4 L x 760 torr/1520 torr = 1.2 L
3.
Al --> Al3+ + 3e-
0 3+ oxidation states
O2 + 4e- --> 2O2-
0 2- oxidation states
For all atoms in elemental state, the oxidation state. is 0.
The actual charge is also the oxidation state for all monoatomic species.
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