3. Consider the following unbalanced reaction and determine the ∆Hº for the reaction using Appendix G in the back of your book. [Report the answer to three sig figs and without unit labels. Use +/- signs to indicate if the value is endo- or exothermic.] ___NO2(g) + ___ H2O(g) --> ___HNO3(g) + ____NO(g)
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3. Consider the following unbalanced reaction and determine the ∆Hº for the reaction using Appendix G...
3. Consider the following unbalanced reaction and determine the ∆Hº for the reaction using Appendix G in the back of your book. [Report the answer to three sig figs and without unit labels. Use +/- signs to indicate if the value is endo- or exothermic.] ___NO2(g) + ___ H2O(g) --> ___HNO3(g) + ____NO(g) hydrogen H2(g) 0 0 130.7 H(9) 217.97 203.26 114.7 H(aq) 0 0 o -230.0 -157.2 -10.75 OH-(aq) H30+(aq) -285.8 69.91 H20(1) -285.83 -237.1 70.0 -241.82 -228.59 188.8...
1. A 25 grams piece of unknown metal at 80 ºC is dropped into 50 grams of water at 25.0 ºC. The final temperature of the water is 26.16 ºC. What is the specific heat of the unknown metal? [Report answer to two sig figs and do not add the unit label.] 2. Determine the ∆H º for the third reaction; is it exothermic ? ClO(g) + O3(g) --> Cl(g) + 2 O2(g) ∆Hº = -29.90 kJ/mol 2 O3(g)...
1. Determine the ∆Sº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3 H2O(l) Report your answer to three sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading. 2. Which of the following equations will have a negative ∆S? A. 3 H2(g)+ N2(g) --> 2 NH3(g) B. C6H6(l)--> C6H6(g) C. NH4OH(s)--> H2O(l)+ NH3(g) D. NaCl(s) -->...
1. A 10.0 chunk of zinc at 100.0 ºC is dropped into a 100 grams of water at 5 ºC. What is the final temperature in Celcius of the water? [Report to three sig figs with no until label.] 2. Calculate the enthalpy for the reaction below at standard conditions using Appendix G in your textbook. [Report the answer to three sig fig, without unit labels, and using +/- signs to indicate if the reaction is endo- or exothermic.] 2...
2. Calculate the enthalpy for the reaction below at standard conditions using Appendix G in your textbook. [Report the answer to three sig fig, without unit labels, and using +/- signs to indicate if the reaction is endo- or exothermic.] 2 Al(s) + Fe2O3(s) --> Al2O3(s) + 2 Fe(s) Substance AH (kJ mol-) AG; (kJ mol-1) Sº (JK-1 mol-2) aluminum 0 0 28.3 324.4 285.7 164.54 -531 -485 -321.7 Al(s) Al(g) Al3+ (aq) Al2O3(s) AlF3(s) AICI3(s) AlCl3.6H2O(s) -1676 -1582 50.92...
5. Balance the following reaction that occurs in base, using the half-reaction method. NO(g) + MnO4-1(aq) ---> NO3-1(aq) + MnO2(s) When this reaction is balanced, there will be (A) OH-1(aq) and (B) H2O(l) in the final balanced equation. (Enter numbers without the plus sign.) 6. 0.122 grams of an unknown triprotic acid was neutralized with 37.2 mL of a 0.125 M NaOH solution. What is the Molar Mass of the unknown acid? Report the answer to three sig figs and...
1. The 2nd Law of Thermodynamics states that the entropy of the universe ____ 2. Determine the ∆Gº using Appendix G for the following reaction. C2H5OH(l) + 3 O2(g) --> 2 CO2(g) + 3 H2O(l) Report your answer to four sig figs. Omit unit labels. Only add a - number is the sign is negative. Adding a + to a positive answer messes up the grading.
problem 5.72 please assist with parts a,b,c and d. Using values from Appendix C or the internet calculate the value of ΔH∘ for each of the following reactions. a. 4HBr(g)+O2(g)→2H2O(l)+2Br2(l) express answer using five sig figs ΔH∘rxn =...............kJ b. 2NaOH(s)+SO3(g)→Na2SO4(s)+H2O(g)2NaOH(s)+SO3(g)→Na2SO4(s)+H2O(g) (ΔHf∘ Na2SO4Na2SO4 = -1387.1 kJ/molkJ/mol) ΔH∘rxn =...........kJ answer using four sig figs c. CH4(g)+4Cl2(g)→CCl4(l)+4HCl(g) ΔH∘rxn..............kJ express answer in four sig figs d. Fe2O3(s)+6HCl(g)→2FeCl3(s)+3H2O(g) ΔH∘rxn..............kJ express answer in two sig figs
Consider the reaction: H2SO4(aq) + BaO(s) → BaSO4(s) + H2O(l) ∆Hº = 1410.4 kJ Using the values from Appendix C, calculate the standard enthalpy of formation of BaSO4(s).
Help would be greatly appreciated Consider the following reaction: S(s, rhombic) + O_2 (g) rightarrow SO_2(g) Use standard heats of formation from Gum Dahl 'Chemical Principles' 7th ed. Appendix Four pp. A19 - A22 How much heat is evolved when 2.886 times 10^2 g of S(s, rhombic) is burned in excess oxygen. Answer to 4 sig figs. How much heat is evolved when 3.000 times 10^2 g of SO_2(g) is produced from the combustion of S(s, rhombic). Answer to 4...