Question

5. Predict which of the following reactions has a negative entropy change. I. 2 HgO(s) →...

5. Predict which of the following reactions has a negative entropy change.

I. 2 HgO(s) → 2 Hg(l) + O2(g)

II. Ba2+(aq) + SO4 2-(aq) → BaSO4(s)

III. 2H2O2(l) → 2 H2O(l) + O2(g)

6. Predict which of the following reactions has a negative entropy change.

I. 2 SO2(g) + O2(g) → 2 SO3(g)

II. MgO(s) + CO2(g) → MgCO3(s)

III. PCl5(s) → PCl3(l) + Cl2(g)

Homework Answers

Answer #1

5) Entropy is like randomness, the more molecules or moles you have, the more chances of random it can be. So, when you start off with two moles of reactants and end up making 3 as products, you've just increased the entropy, therefore, increasing randomness. And when entropy increases, the change in (delta)S is positive. A decrease in entropy yields a negative number.

II. Ba2+(aq) + SO4 2-(aq) → BaSO4(s) reaction has a negative entropy change.

6. The following reactions have a negative entropy change.

I. 2 SO2(g) + O2(g) → 2 SO3(g)

II. MgO(s) + CO2(g) → MgCO3(s)

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. [Negative or...
Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed. [Negative or Postive sign] CH3OH (l) --> CH3OH (g) 2KIO3 (s) --> 2KCl (s) + 3O2 (g) 2H2 (g) + O2 (g) --> 2H2O(l) Pb ^2+ (aq) + 2Cl^- (aq) --> PbCl2 (s)
18)State if the Entropy change for each of the following is positive or negative. How will...
18)State if the Entropy change for each of the following is positive or negative. How will entropy change with increased temp? 2 C4H10 + 9 O2 ====è 4 CO2 + 10 H2O (all gas) CO2 (solid) ==è CO2 gas MgCO3 (solid) ====è MgO (solid) + CO2 (gas) Please show all work and how you arrive at the answer.
Predict whether the entropy change of the system is positive of negative: for NH4Cl(s) --> NH3(g)...
Predict whether the entropy change of the system is positive of negative: for NH4Cl(s) --> NH3(g) + HCl(g)
Which of these reactions IS NOT a reduction-oxidation reaction? I. 2Na (s) + 2H2O(l)  2NaOH(s)...
Which of these reactions IS NOT a reduction-oxidation reaction? I. 2Na (s) + 2H2O(l)  2NaOH(s) + H2 (g) II. AgNO3 (aq) + NaCl (aq)  AgCl (s) + NaNO3 (aq) III. 6Na (s) + Fe2O3 (s)  3Na2O (s) + 2Fe (s) IV. HNO3 (aq) + KOH (aq)  KNO3(aq) + H2O (aq) V. CH4 (g) + 2O2 (g)  CO2 (g) + 2H2O (g) a. I and II b. II and III c. III and IV d. II...
Discuss the effect of temperature change on the spontaneity of the following reactions at 1 atm:...
Discuss the effect of temperature change on the spontaneity of the following reactions at 1 atm: a. Al2O3 (s) + 2Fe (s) ----------2Al (s) + Fe2O3(s) delta H =851.4 kJ; delta S = 38.5 b. N2H4 (l)-----------------N2 + 2H2 (g) delta H = -50.6 kJ; delta S = 0.3315 kJ/K c. SO3 (g) ---------------SO2 (g) + 1/2 O2 (g) delta H = 98.9 kJ; delta S = 0.0939 kJ/K
Part A For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)?...
Part A For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do not need to look up any values to answer this question. Check all that apply. Check all that apply. 1)Li(s)+12F2(l)→LiF(s) .2) SO3(g)→12O2(g)+SO2(g). 3) SO(g)+12O2(g)→SO2(g) . 4) 2Li(s)+F2(g)→2LiF(s). 5)S(s)+O2(g)→SO2(g) .6) Li(s)+12F2(g)→LiF(s)
For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do...
For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do not need to look up any values to answer this question. Check all that apply. Check all that apply. Na(s)+12F2(g)→NaF(s) SO(g)+12O2(g)→SO2(g) Na(s)+12F2(l)→NaF(s) 2Na(s)+F2(g)→2NaF(s) SO3(g)→12O2(g)+SO2(g) S(s)+O2(g)→SO2(g)
For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do...
For which of the following reactions is ΔH∘rxn equal to ΔH∘f of the product(s)? You do not need to look up any values to answer this question. Check all that apply. Hints Check all that apply. 2Li(s)+F2(g)→2LiF(s) S(s)+O2(g)→SO2(g) SO3(g)→12O2(g)+SO2(g) Li(s)+12F2(l)→LiF(s) SO(g)+12O2(g)→SO2(g) Li(s)+12F2(g)→LiF(s)
Which reaction do you predict would have a positive (+) value for entropy (  S)? CO2 (s)...
Which reaction do you predict would have a positive (+) value for entropy (  S)? CO2 (s) → CO2 (g) H2O (l) → H2O (s) H2 (g) + Cl2 (g) → 2 HCl (g) N2 (g) + 3 H2 (g) → 2 NH3 (g) Ag+ (aq) + Cl- (aq) → AgCl (s)
2) The volume of the system is increased for each of the following reactions below. Explain...
2) The volume of the system is increased for each of the following reactions below. Explain whether each system would shift forward, in reverse, or stay the same (no effect) and give brief explanation for your answer. (a) 2 SO2 (g) + O2 (g)2 SO3 (g) (b) H2 (g) + I2 (g)2HI (g) (c) CaCO3 (g)CaO (s) + CO2 (g) (d) Ag+ (aq) + Cl- (aq)AgCl (s)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT