Which of the following statements must be true for the entropy of a pure solid to be zero? I. The temperature must be 0 K. II. The solid must be crystalline, not amorphous. III. The solid must be perfectly ordered. IV. The solid must be a diamond.

Determine whether the change in entropy increases or decreases.The number 1 serves as an example. increase(L-G) 1. Evaporation 2.Solidification 3.Deposition 4.Fusion 5.Condensation 6.Lowering the temperature of ethyl alcohol from 30° C to 10°.

Using tabulated values of S°, calculate the standard entropy per mole of atoms for the following. Ar. The S° for Ar is 154.843 J/(mol*K). J*mol1*K1 eTextbook and Media O2. The S° for O2 is 205.152 J/(mol*K). J*mol-1*K*1 O3. The S° for O3 is 238.9 J/(mol*K). J*mol 1*K1 C2H6. The S° for C2H6 is 229.2 J/(mol*K). J*mol 1*K1

6. Who is the proponent of the Gibbs free energy? A. William Friedrich B. Guglielmo Marconi C. William Gibbs D. Janno Gibbs 7. When AG 2H1 (g) if the entropy values for each substance is as follows: H2(g) = 130.6, 12 (s) = 116.7 and HI (g) = 206.3 A. AS = +165.3 J/K B. AS-165.3 J/K C. AS = -41 J/K D. AS = +453.6 J/K 9. What value of Gibbs free energy can we safely predict that the reaction is spontaneous at all temperatures? A. a negative value C. a positive value at a low temperature B. a positive value D. a positive value at a high temperature 10. What will be the value of the entropy change of the system in the reaction: 6CO₂(g) + 6H₂O(g) → C6H12O6(g) + 602(g) ? C. no change D. cannot be determined A. positive B. negative 11. Ozone (03) in the atmosphere can react with nitric oxide (NO): Os(g) + NO(g) -> NO2(g) + O2(g) Calculate the G for this reaction at 25°C. (AH = -199 kJ/mol, AS = -4.1 J/K-mol) A. -198 kJ/mol B. +198 kJ/mol C.-301.5 kJ/mol D. +301.5 kJ/mol 12. Which of the…

A) for the reaction MgCo3(s) ---> MgO (s) +CO2 we can say that it is a reaction a. spontaneous b. not spontaneous c.in balance d. indeterminate B) Which substance in the following pair of compounds must have the highest standard molar entropy? C2H2 (g) or C2H6(g) a.C2H2(g) b.C2H6 c.C2H2=C2H6(g) d. undetermined

Which species do you expect to have the highest molar entropy? a. CH2Cl2 (g) b. NH3 (g) c. N2O5 (s) d. N2H4 (l)

ouming Calculate the standard molar entropy of vaporization of water at 43.0 °C, given that its standard molar entropy of vaporization at 100.0 °C is 109.0 J-K mol and the molar heat capacities at constant pressure for liquid water and water vapor are 75.3 J-K1.mol-1 and 33.6 J-K.mol, respectively, in this temperature range. J.K-1. mol-1 ASvap TOOLS x10 Question Source: Atkins 7e - Chemical Principles | Publisher: W.H. Fm We The

20. The standard enthalpy of vaporization of methanol is 35.2 kJ/mol at its normal boiling point, 64.6°C. What is the standard change in entropy for the vaporization of methanol at its normal boiling point? A. 104 J/(mol· K) B. 35.2 J/(mol· K) C. 0.544 J/(mol· K) D. 544 J/(mol· K) E. 0.104 J/(mol· K)

43 44 QUESTION 25 Which of the following involves an increase in the entropy of the system? O Formation a gaseous product from a solid reagent. Condensation of water. Temperature of a solution is lowered. O Formation of a crystal from a supersaturated solution. 4 QUESTION 26 According to the Third Law of Thermodynamics a perfect crystalline substance c have zero entropy at Click Save and Submit to save and submit. Click Save All Answers to save all answers. Search the web ww a S