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2. (6 points) Determine whether the following reactions are expected to have positive or negative changes...
Predict whether the entropy change is positive or negative for each of the following reactions. Give reasons for your predictions. a. 2 KClO4(s) + 2 KClO3(s) + O2(g) b. H2O(g) → H20(1) c. 2 Na(s) + 2 H20(1) ► 2 NaOH(aq) + H2(g) d. N2(g) → 2 N(g)
Short Answer: (4 points each) 1.) Predict whether the entropy change is positive or negative for each of the following reactions. GIVE YOUR REASON FOR YOUR PREDICTIONS a) 2KC1O4(s) → 2KCIO3() + O2(8) b) H2O → H2O) c) 2Na(3) + H2O → 2NaOH(aq) + H2() d) N2(g) → 2N) 2.) State whether the sign of the entropy change expected for each of the following processes will be positive or negative, and EXPLAIN YOUR PREDICTIONS. a) PC130) + Cl2(e) → PCls(s)...
6. (3 points) For each of the following reactions, predict the sign (positive or negative) for the AS and AH values. Then determine when the reaction will be spontaneous (always, never, at high temperatures, or at low temperatures). a. CH4(g) + 202 (g) → CO2 (g) + 2H20 (g) b. 4H3PO4(s) - P010 (s) + 6H20 (1) c. HCI (g) + NH3(g) → NH4Cl (s)
For the reactions below, which reactions have negative entropy? 1. AgNO3(aq) + NaCl(aq) --> AgCl(s) + NaNO3(aq) 2. H2O(g) + CO2(8) --> H2CO3(aq) 3. H2(g) +12(8) --> 2 HI(g) 4. C2H2O2(g) --> 2 CO(g) + H2(g) 5. H2O(g) --> H2O(1) O 2, 3, 4 1, 2,5 1,4,5 0 2,4
Predict whether the entropy change for each of the following reactions will have a positive value or a negative value. Calculations are not necessary! (a) 2 CO (g) + 2 Cl2 (g) → 2 COCl2 (g) (b) 2 CO2 (g) → 2 CO (g) + O2 (g) (c) SiCl4 (g) + 2 H2O (g) → 4 HCl (g) + SiO2 (s, quartz)
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
(A) Predict whether the change in entropy (ΔS) is positive, negative or near zero for the following processes at 298K. Provide a molecular level explanation or justification for your prediction. (B) Calculate the change in entropy (ΔS) for the following processes at 298K. i. H2O (s) → H2O (l), melting of ice. ii. Formation reaction for steam (water vapor, H2O (g)). iii. C3H8 (l) → C3H8 (aq), Liquid propane going to aqueous propane. iv. The hydrolysis of the dipeptide glycylglycine...
2. Predict the sign of ASsys for each of the following reactions. Write "positive" or "negative". a. PСls (s) → PCI; (1) + Cl2 (g) b. CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H20 (1) c. Mg(s) + Cl2 (g) MgCl2 (s). d. CH1206 (8) + 602 (g) 6CO2 (g) + 6H20 (g)
2. Indicate whether the following reactions show an increase or decrease in entropy. 2 KClO3(s) → 2KCI(s) + 302(g) on H20() → H20(5) N2(g) + 3H2(g) → NH3(g) NaCl(s) → Na+(aq) + Cl-(aq)
1. Predict whether the entropy change for each of the following reactions will have a positive value or a negative value. Calculations are not necessary! (a) CH4 (g) + H2O (g) → C2H5OH (g) (b) 2 NO2 (g) → 2 NO (g) + O2 (g) (c) A1203 (s) + 3 H2 (g) → 2 Al(s) + 3 H2O (1)