Question

In: Chemistry

Predict the sign of the entropy change for each of the following processes and give your...

Predict the sign of the entropy change for each of the following processes and give your reasoning why:

1. Solid sugar is added to water to form a solution.

2. Iodine vapor condenses on a cold surface to form crystals.

3. N2(g) + 3H2 (g) 2 NH3(g)

4. H2O(l) H2O(g)

5. CaCO3(s) CaO(s) + CO2(g)

6. NH4NO3(s) + H2O(l) NH4+ (aq) + NO3- (aq)

7. freezing of water   

8. boiling of water

9. crystallization of salt from a supersaturated solution

10. the reaction 2 NO(g) → N2O2(g)

11. the reaction 2 H2(g) + O2(g) → 2 H2O(g)

12. Fe(s) → Fe(l)   

13. 2 Fe(s) + 3/2 O2(g) → Fe2O3(s)   

14. HF(l) → HF(g)

15. 2 H2O2(l) → 2 H2O(l) + O2(g)

16. H2O(l) -> 2 H2(g) + O2(g)

17. CO(g) + 3 H2(g)-> CH4(g) + H2O(g)

18. 2 NaHCO3(s) ---> Na2CO3(s) + H2O(g) + CO2(g)

19. CO(g) + H2O(g) ----> CO2(g) + H2(g)

20. CaCO3(s) ----> CaO(s) + CO2(g)

21. 2NH3(g) + CO2(g) ----> NH2CONH2(aq) + H2O(l)

22. 2Na2O2(s) + 2H2O(l) ---> 4NaOH(aq) + O2(g)

23. C2H5OH(l) + 3O2(g) ---> 2CO2(g) + 3H2O(g)

Plz let me know how you did it.

Simple description is the best

Thanks

Solutions

Expert Solution

1. Solid sugar is added to water to form a solution.--------------> positive

dissolution increases randomness

2. Iodine vapor condenses on a cold surface to form crystals.----------------> negative

vapour to liquid randomness decreases, so entropy decreases

3. N2(g) + 3H2 (g) -------------> 2 NH3(g) ----------------> negative

4 moles reactants , 2 moles products   moles decreases, so entropy decreases

4. H2O(l) ----------------> H2O(g) -----------------> positive

liqiud to gas more random

5. CaCO3(s) --------------> CaO(s) + CO2(g) -----------------> positive

solid to gas more random more entropy

6. NH4NO3(s) + H2O(l) ---------------> NH4+ (aq) + NO3- (aq) -----------------> positive

7. freezing of water    ----------------> negative

8. boiling of water -------------------> positive

9. crystallization of salt from a supersaturated solution --------------------> negative

10. the reaction 2 NO(g) → N2O2(g) --------------------> negative

11. the reaction 2 H2(g) + O2(g) → 2 H2O(g) --------------------> negative

12. Fe(s) → Fe(l)    --------------------> postive

13. 2 Fe(s) + 3/2 O2(g) → Fe2O3(s)   --------------------> negative

14. HF(l) → HF(g) --------------------> positive

15. 2 H2O2(l) → 2 H2O(l) + O2(g) --------------------> negative

16. H2O(l) -> 2 H2(g) + O2(g) --------------------> positive

17. CO(g) + 3 H2(g)-> CH4(g) + H2O(g) --------------------> negative

18. 2 NaHCO3(s) ---> Na2CO3(s) + H2O(g) + CO2(g) --------------------> positive

19. CO(g) + H2O(g) ----> CO2(g) + H2(g) --------------------> no change

20. CaCO3(s) ----> CaO(s) + CO2(g) --------------------> positive

21. 2NH3(g) + CO2(g) ----> NH2CONH2(aq) + H2O(l) --------------------> negative

22. 2Na2O2(s) + 2H2O(l) ---> 4NaOH(aq) + O2(g) --------------------> positve

23. C2H5OH(l) + 3O2(g) ---> 2CO2(g) + 3H2O(g)------------------> positive

note : common point in all

enrtopy   increases in the following case

1) conversion of solid to liquid , liquid to gas

2) moles of product increases

3) phase change

queen_honey_blossom answered 8 months ago
Next > < Previous

Related Solutions

Predict the sign of the entropy change for each of the following processes and give your...
Predict the sign of the entropy change for each of the following processes and give your reasoning why: 1. Solid sugar is added to water to form a solution. 2. Iodine vapor condenses on a cold surface to form crystals. 3. N2(g) + 3H2(g) 2 NH3(g) 4. H2O(l) H2O(g) 5. CaCO3(s) CaO(s) + CO2(g) 6. NH4NO3(s) + H2O(l) NH4+(aq) + NO3-(aq) Please let me know why for each questions
predict the sign of the entropy change of the system for each of the following. justify...
predict the sign of the entropy change of the system for each of the following. justify your answer. a. CO(g) + 2H22(g) = CH3OH (l) b. molten Fe solidifies c. silver bromide precipitates upon mixing AgNO3 (aq) and KBr(aq) d. Zink metal dissolves in hydrochoric acid forming ZnCl2(aq) and H2(g)
Predict the sign of entropy change (positive or negative) for the following processes/reactions A) a lake...
Predict the sign of entropy change (positive or negative) for the following processes/reactions A) a lake freezing B) SO2(g) + CaO(s) → CaSO3(s) C) NH3(g) + HCl(g) → NH4Cl (s) D) 4 CO2 (g) + 2 H2O (g) → 2 C2H2 (g) + 5 O2(g) E) N2H4 (g) → N2(g) + 2 H2(g) Please Help!! Answer all of the parts!! Thank You!!
In each of the following cases, predict the sign of change in entropy by providing proper...
In each of the following cases, predict the sign of change in entropy by providing proper explanation.                                                                                                                                                            (i) Isothermal expansion.       (ii) Liquefaction of a gas
Predict the sign for the entropy change ΔSsys for each of the following reactions without doing...
Predict the sign for the entropy change ΔSsys for each of the following reactions without doing any calculations and explain your reasoning. a.Mg(s) + Cl2(g) MgCl2(s) b.HCl(g) + NH3(g) NH4Cl(s) c.2 O3(g) 3 O2(g) d.CH3CH3(g) H2C=CH2(g) + H2(g)
Thermodynamics of KNO3Solubility & Voltaic Cells For each of the following processes, predict the sign (+...
Thermodynamics of KNO3Solubility & Voltaic Cells For each of the following processes, predict the sign (+ or - ) for ?H, ?S, and ?G. Explain your answers conceptually, not with calculations. 1. The decomposition of liquid water to give gaseous oxygen and hydrogen, a process that requires a considerable amount of energy. 2. Dynamite is a mixture of nitroglycerin, C3H5N3O9, and diatomaceous earth. The explosive decomposition of nitroglycerine gives gaseous products such as water, carbon dioxide, and others; much heat...
Predict whether the entropy change is positive or negative for each of the following reactions. a....
Predict whether the entropy change is positive or negative for each of the following reactions. a. 2KClO4(s) --> 2KClO3(s)+O2(g) b. H2O(g) --> H2O (l) c. 2Na(s)+2H2O(l)-->2NaOH(aq)+H2(g) d. N2(g)-->2N(g)
In which of the following cases is the sign of the entropy change (ΔS) positive? options:...
In which of the following cases is the sign of the entropy change (ΔS) positive? options: 2 KCl(g) + 3 O2(g) --> 2 KClO3(s) 2 HgO(s) --> 2 Hg(l) + O2(g) 4 NH3(g) + 7 O2(g) --> 4 NO2(g) + 6 H2O(g) 2 H2S(g) + SO2(g) --> 3 S(s) + 2 H2O(g) 2 Na(s) + Cl2(g) --> 2 NaCl(s)
1. For each of the following processes, give the algebraic sign of ÆHo, ÆSo, and ÆGo....
1. For each of the following processes, give the algebraic sign of ÆHo, ÆSo, and ÆGo. No calculations are necessary; use your common sense. a.The splitting of water to give oxygen and hydrogen gas. 
 b. The combustion of octane. 
 c.The explosion of dynamite 

Consider the following processes and determine if the entropy change of the system is positive, negative,...
Consider the following processes and determine if the entropy change of the system is positive, negative, zero, or you cannot tell. Explain. (a) Liquid water is frozen to form ice. (b) 1 mol of oxygen and 2 mol of hydrogen react isothermally and completely to form 1 mol of water vapor. (c) 1 mol of oxygen and 2 mol of hydrogen react adiabatically and completely to form 1 mol of water vapor.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT