**Educational Assessment**1) **Which of the following statements is TRUE?** A) ΔS_universe is always greater than zero for a nonspontaneous process. B) Exothermic processes decrease the entropy of the surroundings. C) Entropy is not temperature dependent. D) Entropy is an extensive property. E) None of the above are true.2) **For a given reaction, ΔH = +35.5 kJ/mol and ΔS = +83.6 J/K·mol. The reaction is spontaneous ________. Assume that ΔH and ΔS do not vary with temperature.** A) at all temperatures B) at T < 425 K C) at T < 298 K D) at T > 425 K E) at T > 298 K3) **What element is being reduced in the following redox reaction?** \[ \text{H}_2\text{O}_2(l) + \text{ClO}_2(aq) \rightarrow \text{ClO}_2^-(aq) + \text{O}_2(g) \] A) C B) N C) O D) H E) Cl

The condition of spontaneity of a reaction is that overall change in Gibbs free energy should be…

1) Which of the following statements is TRUE? A) ASuniverse is always greater than zero for a nonspontaneous process. B) Exothermic processes decrease the entropy of the surroundings. C) Entropy is not temperature dependent. D) Entropy is an extensive property. E) None of the above are true. 2) For a given reaction, AH = +35.5 kJ/mol and AS = +83.6 J/Kmol. The reaction is spontaneous Assume that AH and AS do not vary with temperature. A) at all temperatures B) at T < 425 K C) at T < 298 K D) at T > 425 K E) at T > 298 K 3) What element is being reduced in the following redox reaction? H₂O2(1) + ClO2(aq) → ClO₂¯(aq) + O2(g) C) O A) C B) N D) H E) Cl

1) Which of the following statements is TRUE? A) ASuniverse is always greater than zero for a nonspontaneous process. B) Exothermic processes decrease the entropy of the surroundings. C) Entropy is not temperature dependent. D) Entropy is an extensive property. E) None of the above are true. 2) For a given reaction, AH = +35.5 kJ/mol and AS = +83.6 J/Kmol. The reaction is spontaneous Assume that AH and AS do not vary with temperature. A) at all temperatures B) at T < 425 K C) at T < 298 K D) at T > 425 K E) at T > 298 K 3) What element is being reduced in the following redox reaction? H₂O2(1) + ClO2(aq) → ClO₂¯(aq) + O2(g) C) O A) C B) N D) H E) Cl

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Consider the following reaction: 2 H,S(g) + 30,(g) –- 2 H,O(g) + 2 SO,(g) and the following table of standard enthalpies of formation and standard absolute entropies: compound AH (kJ mol") s° (JK' mol") H,S(g) -20.6 205.8 02(g) 205.2 H2O(g) |-241.8 188.8 So,(9) |-296.8 248.2
How do enthalpy and entropy relate to each other? If enthalpy is negative, does that mean that entropy will be positive
What is AS° for the following reaction? 2CI2(g) + SO2(g) → SOCI2(g) + Cl2O(g) Substance: Cl2g) SO23) SOCI23) Cl20(g) S°U/K • mol): 223.0 248.1 309.8 266.1 1270.0 J/K mol -104.8 J/K • mol 118.2J/K mol 104.8 J/K • mol -118.2 J/K • mol
Determine the S'universe at 298 K for the reaction: 31.342 J/mol K 2NO(g) + 20z(g) → 2NO2(g) For the reaction, 4KCIO3(s) → 3KCIO«(s) + KCI(s) Calculate AGʻsys for the process at 298 K if AH'sys =144.3 kJ and AS'sys = -36.8 J/K. 133.33 kJ A key step in the production of sulphuric acid is the oxidation of SO2(g) + Oz(g) → 2SO3(g) At 98K, AGʻsys = - 500.51kJ; AH’sys = - 494.61. kJ; and AS'sys = -60.16 J/K a) Use the data to decide if this reaction is spontaneous at 25°, and predict how AG° will change with increasing T Reaction is spontaneous at lower temperature and vice versa b) Assuming AH´sys and AS'sys are constant with increasing T, is the reaction spontaneous at 900°C? Spontaneous
Hint: No calculations are required. For the reaction 2HBr(g) + Cl2(g)- >2HCI(g) + Br2(g) AH° = -81.1 kJ and AS° =-1.20 J/K At standard conditions, this reaction would be product favored O at all temperatures. O at relatively high temperatures. O at no temperature. O at relatively low temperatures.
Number 7 please
Given the values of AH, ASn, and T, determine ASuniy and predict whether or not each reaction is spontaneous. (Assume that all reactants and products are in their standard states.) a. AH = -95 kJ; AS;n = -157 J/K; T = 298 K b. AH = -95 kJ; AS"n = -157 J/K; T = 855 K Calculate the Gibbs free energy for the above sets (a) and (b)
What is AS for the following reaction? 2Cl2(g) + SO2(g) SOCI₂(g) + Cl₂O(g) Substance: Cl₂(g) SO2(g) SOCI2(g) C1₂O(g) 223.0 248.1 309.8 266.1 S(J/K. mol):
A reaction has AH = -112 kJ and ASan = 354 J/K. At what temperature is the change in entropy for the reaction equal to the change in entropy for the surroundings?
Consider entropy and its role in determining if chemical and physical processes are spontaneous. For any process to be spontaneous, what must happen to the entropy of the universe during that process? Acetone will spontaneously vaporize when coming in contact with your skin even though acetone has a much higher boiling point. Explain how this occurs in light of your answer to part (a).
Compare what will happen to the entropy of the whole system in the following two scenarios: A) if the oil molecules are all clumped together and the clump is surrounded by water and B) if the oil molecules are spread out evenly throughout the water, each individual oil molecule surrounded by water?
Consider the chemical reactions below and their given deltaG of reactions; NiO(s) → Ni(s)+0,(g) AG° = +115 kJ C(s) +0,(g)→CO(g) AG° = -250 kJ MnO(s) → Mn(s)+0,(g) AG° = +280 kJ If Manganese metal is burned (i.e., combustion in excess oxygen) with NiO(s), metallic Ni and Mno can be produced (through coupled reactions). Select one: O True O False