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Practice Problem ATTEMPT Calculate the standard entropy change for the following reactions at 25°C. Predict first...
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)
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) 2 SO, (g) + O2(g) → 2 SO, (g) (b) 2 COCI, (g) → 2 CO (g) + 2 Cl: (g) (C) 4 Fe (s) + 3 CO, (g) → 2 Fe,0, (s) + 3 C (s, graphite)
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)
Calculate the standard entropy change for the following reaction
at 25 °C. S° values can be found here.
Calculate the standard entropy change for the following reaction at 25 °C. S values can be found here H,graphite) (H, +co Number J/K
1. Predict whether the entropy change for each of the following reactions will have negative value. Calculations are not necessary! (a) CS2 (g) + 3 02 (g) → CO2(g) +2 SO2 (g) (b) 2 CH4 (g) + 3 02 (g) → 2 CO (g) + 4H2O(g) (c) 2 NH4 (1) +2 NO2 (g) → 3 N2(g) + 4H2O(g) 2. Calculate the entropy change at 25°C for the following reaction: Ca (s) + 0.125 S, (s) + 2 02 (g) →...
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)
Calculate the standard entropy change for the reaction at 25°C. Standard molar entropy values can be found in this table. HCl(g) + NaOH(s) + NaCl(s) + H,O(1) AS mol)
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...
Predict the sign (positive or negative) on the entropy change for each of these reactions. (a) 2 50, (e) + O2(g) → 250 (6) (b) 2 NH; (6) ► N2 (€) + 3 H2 (8) (c) CO (B) + 2 H2(g) → CH3OH (0)
Calculate the total entropy change when each of the following reactions are run at 25°C. Is each reaction spontaneous or nonspontaneous? CH4(g) + H2O(g) ---> CO(g) + 3H2(g)