Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Calculate the reaction entropy (S°rxn) for the following reaction: 4 NH3 + 5 O24 NO + 6 H2O.
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- A chem ngineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 45.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = 2220. kJ J AS = 6943. K 3CO, (g) + 4H,0(1) → C,H, (g) + 50, (g) AG = kJ Which is spontaneous? this reaction the reverse reaction neither AH = 852. kJ J AS = K Al, 0, (s) + 2Fe(s) →…arrow_forwardA chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 20.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = - - 1212. kJ J AS 4174. K Ś ? AG = 4H₂O₂ (1) + PbS (s) PbSO4 (s) + 4H₂O (1) ☐ kJ Which is spontaneous? this reaction the reverse reaction neither - 1237. KJ 6C (s) + 6H₂(g) + 30₂…arrow_forwardA chemicai engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 64.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = 33. kJ J AS = 177. K | 2Fe (s) + 3H,0(1) → Fe,0, (s) + 3H, (g) AG = OkJ Which is spontaneous? this reaction the reverse reaction neither AH = - 107. kJ s =% J AS = K AG = 0. kJ…arrow_forward
- 2. Describe the spontaneity of the following reactions. AH= 91.8 kJ 1. Nxe + 3H 2(g) 2NH, 3(g) 2(g) 2. CS20 CS2) ΔΗ= 29.1 kJ ----arrow_forwardUse the data from this table of thermodynamic properties to calculate the values of ASxn for each of the reactions at 25 °C. 4 NH3(g) +702(g) → 4 NO2(g) + 6H2O(g) ASixn= -110.22 Incorrect 2 H₂O₂(1) 2H2O(l) + O2(g) ASixn= Incorrect J K Karrow_forwardFor a certain chemical reaction, the standard Gibbs free energy of reaction at 15.0 °C is 142. kJ . Calculate the equilibrium constant K for this reaction.Round your answer to 2 significant digits.arrow_forward
- A chemicai engineer is studying the two reactions shown in the table below. In each case, she fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 135.0 °C and constant total pressure. Then, she measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of her measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. ΔΗ - 1648. kJ AS = 4038. K 2Fe,0, (s) → 4Fe(s) + 30, (g) AG = ||kJ Which is spontaneous? this reaction the reverse reaction neither AH = - 803. kJ AS = K CH, (g) + 20,(g) → co,(g)…arrow_forward5. What can be interpreted if only given the following? C6H12O6(s) ----> C6H12O6(aq) The enthalpy of the reaction is negative. The enthalpy of the reaction is positive. The entropy of the reaction is negative. The entropy of the reaction is positive. Not enough information is provided to make any predictions.arrow_forwardCalculate the standard entropy of reaction, ΔS° (in J K−1 mol−1), for: Na2CO3(aq) + 2 HCl(aq) → 2 NaCl(aq) + H2O(l) + CO2(g) given the following data: Na2CO3(aq) HCl(aq) NaCl(aq) H2O(l) CO2(g) S° (J K−1mol−1) 134.98 56.5 115.5 69.91 213.74 Here are the possible answers: +323.2 -207.7 +266.7 +207.7 -266.7arrow_forward
- A chem ngineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 15.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. AH = 1237. kJ J AS = 4239. K С, н, о, () — 6с() + 6н, (з) + з0,(s) - 6C(s) + 6H, (g) + 30, (g) AG = | kJ Which is spontaneous? this reaction the reverse reaction neither AH = 50. kJ AS = K…arrow_forwardA chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 54.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium.arrow_forwardPlease round to 2 sigfigs!arrow_forward
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