Chemistry: The Molecular Science
5th Edition
ISBN: 9781285199047
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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- Nonearrow_forwardSodium reacts violently with water according to the equation: 2 Na(s) + 2 H2O) → 2 NaOH(aq) + H2g) The resulting solution has a higher temperature after the reaction. What are the signs of AH and AS° for this reaction? AH° is positive and AS° is negative. AH° is negative and AS° is positive. AH° is negative and AS° is negative. AH° is positive and AS° is positive.arrow_forwardSodium reacts violently with water according to the equation below. 2 Na(s) + 2 H₂O → 2 NaOH(aq) + H₂(g) The resulting solution has a higher temperature than the water prior to the addition of sodium. What is the sign of AH° for this reaction? And is the reaction endothermic or exothermic? Select one: AH° is negative and the reaction is endothermic AH° is negative and the reaction is exothermic AH° is positive and the reaction is exothermic AH° is positive and the reaction is endothermicarrow_forward
- You may want to reference (Pages 187 - 190) Section 5.7 while completing this problem. Part A Using values from Appendix C, calculate the value of AH° for each of the following reactions. CaO(s)+ 2HC1(g)→CaCl (s) +H20(g) Express your answer using four significant figures. ΑΣφ ? AĦgm = kJ Submit Request Answer Part B 4FEO(s) + 02 (g)→2FE2O3 (s) Express your answer using four significant figures. ΔΗ kJ Submit Request Answerarrow_forward2 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g) AH-393 kJ/molræn When 3.9 g of K(s) is added to 200. mL of water at 25°C in a calorimeter, all the K(s) reacts with the water as represented by the equation above. Which of the following is true about the pH of the water after the reaction is complete? (A) pH 7 The pH of the water cannot be determined without additional information.arrow_forwardChemistryarrow_forward
- Given: 2MNO(s) + O2(g) → 2MnO2(s) ArH = –269.6 kJ · mol-1arrow_forwardGiven: 2 Ag+(aq) + Cu(s) ⟶ 2 Ag(s) + Cu2+(aq) ΔGo = -88.66 kJ/mol Calculate the value of Eo. ΔGo = -nFEo F = 96500 Express the answer to 3 sig. figs.arrow_forwardItem 8 Part A The value of AG" at 281.0 °C for the formation of phosphorous trichloride from its constituent elements, P2(e) + 3 Cla(e) → 2 PC (8) kJ/mol. At 25.0 °C for this reaction, AH° is –720.5 kJ/mol, AG° is 642.9 kJ/mol, and AS° is 263.7 J/K. is O 7.34 x 104 646.4 O -574.4 O - 866.6 O 1.45 x 10 Submit Request Answerarrow_forward
- Calculate the standard enthalpy change for the reaction 4A + 2B → 2AB + A2 Given: 2A+B A2B 2A2B 2AB+ A2 AH° = – 25.0 kJ/mol %3D AH° = 35.0 kJ/mol %3D O 10.0 kJ/mol O-15.0 kJ/mol 45.0 kJ/mol -95.0 kJ/mol O-60.0 kJ/molarrow_forwardYou may want to reference (Pages 187 - 190) Section 5.7 while completing this problem. Part C Using values from Appendix C, calculate the value of AH° for each of the following reactions. 2CuO(s) +NO(g)→CU2O(s) +NO2 (g) Express your answer using three significant figures. ? ΔΗ3 kJ Submit Request Answer Part D 4NH3(g) + O2 (g)→2N2H4(g) +2H2O(1) Express your answer using five significant figures. ? AĦgm = kJarrow_forwardCalculate AH for the reaction: 2NH3 (g) + O2(g) → N2H4 (1) + H2O(1) given the following data: 2NH3 (g) + 3N20(g) → 4N2(g) + 3H2O(1) AH = –1010. kJ N20(g) + 3H2 (9) → N¿H4(1)+H2O(1) AH = -317 kJ N2H4 (1) + O2 (g) → N2(g)+ 2H2O(1) AH = -623 kJ H2 (9) + 02 (9) → H2O(1) AH = -286 kJ ΔΗ - kJarrow_forward
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