alculate the standard change in enthalpy (kJ) for the following reaction: 2 SO 2

Question

alculate the standard change in enthalpy (kJ) for the following reaction:

2 SO2 (g) + O2(g) ? 2 SO3 (g)

Question 1 options:

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Question 2 (0.38 points)

Calculate the standard change in entropy, ?S

A) -99 B) +198 C) +99 D) -198 E) -495 alculate the standard change in enthalpy (kJ) for the following reaction: 2 SO2 (g) + O2(g) ? 2 SO3 (g) Question 1 options: A) -99 B) +198 C) +99 D) -198 E) -495 Question 2 (0.38 points) Question 13 Saved Identify the correct statement for the following reaction: Question 13 options: A) The reaction is always spontaneous. B) The reaction is never spontaneous. C) The reaction is at equilibrium; therefore, ? G= 0. D) The reaction could be spontaneous at high temperatures. E) The reaction could be spontaneous at low temperature. Question 12 Unsaved Which of these substances has the highest molar entropy? Question 12 options: A) C2H4 (g) B) CH3CH2OH (l) C) SO3 (g) D) CH3CH3 (g) E) C6H12O6 (g) Question 13 (0.44 points) Question 11 Unsaved Identify the reaction which would result in an increase in entropy. Question 11 options: A) N2 (g) + 3 H2 (g) ? 2 NH3 (g) B) Na+ (aq) + Cl- (aq) ? NaCl (s) C) 2 Cu (s) + O2 (g) ? 2 CuO (s) D) HgS (s) + O2 (g) ? Hg (l) + SO2 (g) E) all of the above Question 12 (0.38 points) Question 10 Saved The value of K for a certain reaction is 4.3 ??? 10-8 at 100°C. What is the value of ?G° for this reaction at 100°C? Question 10 options: A) 52.6 B) 14.1 C) -52.6 D) -14.1 E) -22.8 Save Question 11 (0.38 points) Question 9 Unsaved Calculate the equilibrium constant, K, for the following reaction at 25°C: 2 SO2 (g) + O2 (g)? 2 SO3 (g) Question 9 options: A) 15 ??? 10-25 B) 3.5 ??? 10-59 C) 6.9 ??? 1024 D) 2.6 ??? 1012 E) 4.2 ??? 10-13 Save Question 10 (0.38 points) Question 8 Unsaved Estimate the boiling point (°C) for the reaction: HF (aq) ? HF (g) ?H°f (kJ/mol) S° J/mol · K HF(aq) - 332.6 88.7 HF(g) - 273.3 173.8 Question 8 options: A) 697 B) 275 C) 1380 D) 424 E) 110 Save Question 9 (0.38 points) Question 7 Saved How much free energy is released or absorbed (kJ) when 65 g of NH3 is consumed in the following reaction at 25°C? NH3 (g) + HNO3 (g) ? NH4NO3 (aq) ?G°=-99.5kJ Question 7 options: A) -28 B) -380 C) -110 D) +110 E) +380 Save Question 8 (0.38 points) Question 6 options: A) -29.4 B) +52.6 C) +105 D) -52.6 E) -105 Save Question 7 (0.38 points) Question 6 Saved How much free energy is released or absorbed (kJ) when 200 g Fe is produced? Question 5 Unsaved Calculate the standard change in free energy, ?G°, (kJ) for the combustion of C2H5OH (l) at 25°C. Question 5 options: A) -1200 B) -1280 C) -810 D) -1300 E) -1680 Save Question 6 (0.38 points) Question 4 Saved Calculate the standard change in free energy, ?G°, (kJ) for the combustion of C6H6 at 298K. Question 4 options: A) -6350 B) -3060 C) -5910 D) -510 E) -280 Save Question 5 (0.38 points) Question 3 Saved Calculate the standard change in free energy, ?G°, (kJ) for the following reaction at 298°C: 4 NH3 (g) + 5 O2 (g) ? 4 NO (g) + 6 H2O (g) Question 3 options: A) -1080 B) -960 C) -850 D) -1010 E) -730 Save Question 4 (0.38 points) 0502.gif?_&d2lSessionVal;=88PCnLORGhYmFZg)+ 3 O2 (g) ? CO2 (g) + 2 SO2 (g) Question 2 options: A) +105 B) -56.1 C) +354 D) +56.1 E) -105 Save Question 3 (0.38 points) Question 2 Saved Calculate the standard change in entropy, ?S°, (J/K) for the reaction: CS2 (

Explanation / Answer

1) A

2) E

3) C

4) D

5) A

6) B

7) C

8) D

9) A

10) B

11) C

12) D

13) E

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