Dynamic equilibrium and physical equilibria, Henry's law
- The Henry's law constant (K_H) values of three gases (A, B, C) in water are 145, 2×10^-5 and 35 kbar, respectively. The solubility of these gases in water follow the order: Answer: 3. B > C > A Key idea: by Henry's law p=K_Hx , so a larger K_H means lower solubility. K_H : B ( 2×10⁻⁵ ) < C (35) < A (145) kbar. S... 1
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : Helium is used to dilute oxygen in diving apparatus.Reasons R : Helium has high solubility in O_2.In the light of the above statement… Answer: 4. A is true but R is false. Key idea: Gases dissolve in blood at high pressure; helium is chosen because it is hardly soluble. Asse... 1
- The correction factor 'a' to the ideal gas equation corresponds to Answer: 4. forces of attraction between the gas molecules In the van der Waals equation (P+an²/V²)(V-nb)=nRT , the term a corrects the press... 1
- Given van der Waals constant for NH_3, H_2, O_2 and CO_2 are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied ? Answer: 1. NH ₃ The more easily a gas liquefies, the stronger its intermolecular attraction, and the van der Waals constant a measures exact... 1