For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS If it's not possible to decide with the information given, check the "not enough information" rxn button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. Zn (s) + 2HCl(aq) → ZnCl₂ (aq) + H₂ (8) NaOH (s) reaction 1 Na (aq) + OH (aq) CO(g) + 2H₂(g) - CH₂OH(g) sign of reaction entropy AS rxn AS rxn ΔS O not enough information. rxn ΔS rxn <0 > 0 AS rxn < 0 O not enough information. > 0 AS < 0 rxn > 0 not enough information.

For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS If it's not possible to decide with the information given, check the "not enough information" rxn button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. Zn (s) + 2HCl(aq) → ZnCl₂ (aq) + H₂ (8) NaOH (s) reaction 1 Na (aq) + OH (aq) CO(g) + 2H₂(g) - CH₂OH(g) sign of reaction entropy AS rxn AS rxn ΔS O not enough information. rxn ΔS rxn <0 > 0 AS rxn < 0 O not enough information. > 0 AS < 0 rxn > 0 not enough information.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS, If it's not Ixn" possible to decide with the information given, check the "not enough information" button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. reaction sign of reaction entropy AS 0 AS rxn not enough information. AS 0 AS rxn not enough information. AS 0 not enough information. ?
For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy A.Sxn If it's not possible to decide with the information given, check the "not enough information" button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. reaction H₂O(/) + AL₂ S₂ (s) → H₂S (g) + Al₂O₂ (s) 2C₂H, (g) + 70₂(g) → 4CO₂(g) + 6H₂O(g) BaCl₂ (aq) + K₂SO4 (aq) BaSO₂ (s) + 2K Cl(aq) sign of reaction entropy AS rxn AS rxn not enough information. AS 0 X 0 rxn not enough information. 3
Choose the INCORRECT statement. o Gibbs energy is defined by: G = H - TS. o If AG < 0, the process is spontaneous. o If AG=0, the process is spontaneous. o One form of the second law of thermodynamics is all spontaneous processes produce an increase in the entropy of the universe. o If AG 0, the process is nonspontaneous.
8. The following constant pressure process occurs spontaneously when the system, initially at a different temperature from its surroundings, attains the same final temperature as the surroundings. Ar(g, 28 °C, 1 atm) ⟶ Ar(g, 70 °C, 1 atm) Which of the following statements about this process is/are correct? You may choose more than one, or none, of the statements. The entropy of the system increases: ΔS > 0. The entropy of the surroundings increases: ΔSsurr > 0. The entropy of the universe increases: ΔSuniv > 0. Work is done by the system on the surroundings. Heat flows from the system into the surroundings.
The acid HB ionizes 3.00 percent in a 0.600 M HB solution to reach equilibrium under standard state according to the reaction: HB(aq) + H2O(l) + 1.40 kJ → H3O+(aq) + B-(aq) - Determine entropy change for the ionization of HB under standard state.
For each of the following reactions, indicate whether you would expect the entropy of the system to increase or decrease, and explain why. Write A if it will increase and B for decrease. If you cannot tell just by inspecting the equation, explain why. • CH3OH(l) → CH3OH(g) • N2O4(g) → 2NO2(g) • CO(g)+H2O(g) → CO2(g)+H2(g) • 2KClO3(s) → 2KCl(s) +3O2(g) • 2NH3(g)+H2SO4(aq) → (NH4)2SO4(aq)
By examining the following graphs, predict which element- copper or gold-has the higher absolute entropy at a tem- perature of 200 K. 0.3 0.2 Au Cu 0.1 100 200 300 Temperature (K) 7U mol-! K-2)
Predict the sign of entropy. Write P if it is positive and N for negative. • sugar dissolving in tea • air pumped into a tire • frost forms on a window pane • acetone evaporates from nail polish remover • decomposition of calcium carbonate • combustion of methane synthesis of nitrogen and hydrogen gas • nitrate reaction between sodium iodide and potassium • CaCO3(s) → CaO(s) + CO2(g) • N2(g) +3H2(g) → 2NH 3(g)
For the following reactions, indicate whether the entropy of the system increases, decreases, or remains nearly the same. a. Al3+(aq) + 3 OH-(aq) → Al(OH)3(s)b. CaCO3(s) → CaO(s) + CO2(g)c. Mg(s) + Cu2+(aq) → Mg2+(aq) + Cu(s)
For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS, to decide with the information given, check the "not enough information" button in the last column. I rxn Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. reaction CaCl₂ (aq) + Na₂CO3(aq) → CaCO3 (s) + 2NaCl(aq) CaO(s) + CO,(g) CaCO3(s) HCI(g) + NH₂(g) NH₂Cl(s) sign of reaction entropy AS rxn AS > 0 rxn not enough information. AS 0 rxn not enough information. AS 0 rxn not enough information. X If it's not possible
rxn For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropy AS. If it's not possible to decide with the information given, check the "not enough information" button in the last column. Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal. reaction H₂O (1) + Al₂S₂ (s) → H₂S (g) + Al₂O₂ (s) CO(g) + 2H₂(g) CH₂OH (g) CaO(s) + CO,(g) CaCO3(s) sign of reaction entropy AS 0 rxn not enough information. AS 0 rxn not enough information. AS 0 rxn not enough information. X S
Use the data below to calculate the value of the equilibrium constant for the following reaction at 298 K. Please give your answer with 2 significant figures. 3 NO2(g) + H2O(e) → 2 HNO3(e) + NO(g) AfG [H2O(l)] = -237.2 kJ mol-1 ; AFG°[HNO3(e)] = -79.9 kJ mol-1 ; AfG [NO(g)] = 86.7 kJ mol-1; AfG°[NO2(g)] = 51.8kJ mol-1