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(a) Express the second law of thermodynamics in words.
(b) If the entropy of the system increases during a reversible process, what can you say about the entropy change of the surroundings?
(c) In a certain spontaneous process the system undergoes an entropy change, ?S = 42 J/K. What can you conclude about ?Ssurr?
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 x 10^-4.
What's the oxidation number of the following? A.) Ga in Ga(OH)3; B.) Hg in Hg2Cl2; C.) Zn in Zn(OH)4 2-; and As in H2AsO3-
Calculate the number of grooves per centimeter for your grating. Hint: if the groove spacing was 0.1 ft, then how many grooves would you have per foot?
The unit cell of a compound containing strontium, iron, and oxygen is shown here. What type of lattice does this crystal possess (all three lattice vectors are mutually perpendicular)?
Question- In oxygen evolving complexes, there are compound that can reversibly absorb and release oxygen and compounds that cannot. Can you explain the oxygen gas absorption and release reversibility by connecting it to the O-O bond state of the o..
Benzene has a boiling point of 80.1 degrees celcius and a molal boiling point elevation constant of 2.53 degrees celcius/m. Calculate the boiling point of a solution containing 15.0 g of the non-electrolyte C6H4Br2 in 125 ml of benzene (sp gravity..
Calculate the pH of a sodium cyanide solution that is 0.37M NaCN. The Ka for hydrocyanic acid HCN is 4.00E-10.
at 25 c and 1.0 atm .25 g of a gas dissolves in 1.00l of water. what mass of the gas dissolves in 1.00l of water at 25c
In a process called liposuction, a doctor removes some adipose tissue from a person's body. If the body fat has a density of 0.94 g/mL and 3 quarts of fat are removed, how many pounds of the fat were removed from the patient
What is the final state of the system after 26.0 kJ of energy is removed from 150.0 g of water at 1 atm. The water has an initial temperature of 20.0?C . Cs(ice) 2.092 J/g?C Cs(water) 4.184 J/g?C ?Hfus ice 6008 J/mol
If the same amount of sebacoyl chloride, 1,6-hexanediamine and sodium hydroxide were combined , but the solvent was used to afford a homogenous reaction mixture
A certain weak base, which we will represent by the symbol B, has a basicity constant Kb = 3.7 x 10^-4 at 25 *C. The pH of a solution in which [B] = [BH^+] is
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