Which of the following statements about the standard molar entropy (S°) is true?
Select one:
a. The standard molar entropies for a substance are determined from the heat capacity
b. The standard molar entropies for elements in their standard states is zero
c. S° for F2(g) is less than S° for Br2(g) because F2 is lighter than Br2
d. S° generally increases with the size of the molecule (I.e. the number of atoms)
e. None of the above
Which of the following statements about the standard molar entropy (S°) is true? Select one: a....
Which of the following statements are true (select ALL that apply) (a) The standard entropy of any compound is greater than 0. (b) For a given compound the entropy of a molecule in the gas phase is higher than in a liquid at the same temperature. (c) In a spontaneous process the entropy of the system always increases (d) In a spontaneous process the entropy of the universe always increases. (e) The reaction entropy is always positive. (f) The standard...
For each pair of substances, choose the one that you expect to have the higher standard molar entropy (s ) at 25 degrees celsius 1) NaNO3(s) or Na NO3 (aq) 2) CH4(g) or CH3CH3(g) 3) Br2(l) or Br2(g) 4) Br2(g) or F2(g) 5) PCl3(g) or PCl5(g) 6) CH3CH2CH2CH3(g) or SO2(g)
Model - Entropy as a State Function Entropy, S, as with all other state functions like internal energy, E, and enthalpy, H, is a function of the state of a system. Because measuring the absolute state of a system more difficult than measuring the changes in its states, it is the change in entropy, ΔS, in which we will be interested. This means the only aspects that will interest us will be the difference in the final and initial entropies...
20. Which of the following statements is FALSE? A. The entropy of the universe increases during spontaneous processes. B. During chemical and physical changes, energy is conserved. C. The entropy of H2O liquid is greater than the entropy of H2O solid at 0°C. D. The entropy of O2(g) should be greater than the entropy of CO2(g) when at the same temperature, E. The absolute entropy of a substance generally decreases when temperature decreases.
Part A Which substance in each of the following pairs would you expect to have the higher standard molar entropy? Explain. Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help liquids have more randomness than gases Of CO2(g) and CO(g), has the higher standard molar entropy because CH3OH(1) of Iz(s) and I2(g) C2H6(8) has the higher standard molar entropy because CH, OH(g) I_(g) Of CH3OH(g) and CH3OH(1), has the higher...
5. Which of the following statements about entropy is true? a) Entropy is a measure of system multiplicity. b) The standard unit of entropy is kcal/mol. c) Entropy cannot be visualized in terms of disorder. d) In general, the entropy of a protein increases during folding.
Which of the following are listed in order of increasing standard molar entropy? Au(s)< Aulg) H20) CH3OH() < H2O(g) Au(s)< H2O(0 CH3OH() Auls) H2Olg) Au(s)< H2O()< CH3OH()< H2Ola)< Aulg) H20(0 CH3OH(0<Au(s)<Au(s) < H2Olg) H2O(M Auls)<CH,OH()< H2O(g)<Au(g)
For each pair of substances, circle the one with the higher standard molar entropy (S°) at 25 °C. Explain a. I(s) or I(g) Reason:________________________________________________________ b. C(s, diamond) or C(s, graphite) Reason:_______________________________________
Without referring to a data table, rank the following compounds by standard molar entropy. . Highest S HF(g) Ne(g) F2(g) Lowest S Which of the following reactions is likely to be product favored based on energetic considerations? (You can select more than one reaction) 2 Na(s)+ Ch(g)-> 2 NaC(s) 2 NHs(g)->No(9)+ 3 H2(9) CH4g) +2 H200)-> COg) H4 H2(9)
Which of the following has the highest standard molar entropy at 298 K? N2(s) He(g) CH4(l) N2(g) C2H6 (g)