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)
For each pair of substances, choose the one that you expect to have the higher standard molar entropy (s ) at 25 degree...
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:_______________________________________
For each of the following pairs of substances, determine which has the larger molar entropy at 298 K: (A) Br2(l) or (B) Cl2(g) (C) Fe(s) or (D) Ni(s) (E) C2H6(g) or (F) C2H4(g) (G) CH4(g) or (H) CCl4(g) (I) MgO(s) or (J) HgO(s) (K) NaCl(aq) or (L) MgCl2(aq) Enter the six letters in order (e.g. ACEGIK, BDFHJL, etc.)
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
(3 points) In each pair, circle the molecule or atom with the expected higher entropy. 5. b. K(s) Na(s) a. SO2(g) SO3(g) c. N2H4(g) N2H41) (3 points) In each pair, circle the molecule or atom with the expected higher entropy. 5. b. K(s) Na(s) a. SO2(g) SO3(g) c. N2H4(g) N2H41)
11. For each pair of substances determine which has the higher entropy per mole of substance. a. H2O (s) at 200 K or H2O(s) at 298 K. b. H2(g) at 298 K, 2.0 atm or H2(g) at 298 K, 1.0 atm. c. H2(g) at 298 K, 5.0 L or H2(g) at 298 K, 1.0 L. d. H2(g) at 500 K, 1.0 atm or H2(g) at 298 K, 1.0 atm. e. H2O(l) at 298 K or H2O(g) at 298 K. f....
Which of the following would have a positive change in standard entropy at constant temperature? Choose all that apply. CaCO3 (s) CaO (s) + O2(g)Hg(l) Hg(s)Ag(CN)2- (aq) Ag+ (aq) + 2 CN- (aq)C2H2 (g) + F2 (g) C2H2F2 (g)CO2(g) CO2(s)
Thermodynamic properties of pure substances Standard thermodynamic quantities for selected substances at 25 ° C listed alphabetically by most important atom. substance Δ Hf ° (kJ/mol) Δ Gf ° (kJ/mol) S ° (J/mol∙K) Aluminum Al3+ (aq) --- -485.0 --- Al (s) 0 0 28.3 Al2O3 (s) -1675.7 -1582.3 50.9 Al(OH)3 (s) --- -1147.25 --- Bromine Br− (aq) --- -104.0 --- Br2 (l) 0 0 152.2 Br2 (g) 30.9 3.1 245.5 HBr (g) -36.3 -53.4 198.7 Calcium Ca2+ (aq) --- -553.6...
if you can't answer all ,please don't answer 1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...