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12. Given the reaction below: SiCIA (g) + 2 Mg(s) - 2 MgCl2 (s) + Si...
12. Given the reaction below: SiCl4 (9) + 2 Mg (s) — 2 MgCl2 (s) + Si (s) AH = -625.6 kJ (a) Is the reaction endothermic or exothermic? (2 points) exothermic (b) How much heat would it take to produce 650 g of solid silicon? (6 points)
12. Given the reaction below: AH = -625.6 kJ SiCl4 (9) + 2 Mg (s) — 2 MgCl2 (s) + Si (s) (a) is the reaction endothermic or exothermic? (2 points) (b) How much heat would it take to produce 650 g of solid silicon? (6 points)
9. Predict the products of the reactions below and balance the equations. If no reaction would occur, write NR. (4 points each) (a) 241 +312 -2A113 (b) Ba(OH)2 + HBI BaBr 2 + H2O (c) C&H 206 + O2 → 10. What volume of a 2.00 M solution of AuCl2 would be necessary to give 1.65 g of AuCiz? (5 points) 11. A solution of KOH was titrated with 0.1423 g of HBr. If 3.08 mL of KOH solution were...
Consider the following reaction: Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2 (g) ΔHrxn = –4.6 × 102 kJ a. Is this reaction endothermic or exothermic? Circle one. [1] b. How much heat is evolved when 1.37 g of Mg are dissolved in excess HCl? [5] c. If 1.37 g of Mg are dissolved in enough HCl to make 250.0 mL of solution in a coffee-cup calorimeter, what is the final temperature of the solution? (Assume density...
Must Show all work Calculate S deg for the reaction: 1/2SiCl4(g) + Mg(s) --------> MgCl2(s) + 1/2 Si(s) Substance: SiCl4(g) Mg(s) MgCl2(s) Si(s) S deg (J/K x mol): 330.73 32.68 89.62 18.83
Given the information below, calculate ∆?∘?,298.15? and ∆?∘?,400? for the following reaction: ??(?) + 2???(?) → ?2(?) + ????2(?) Assume that heat capacities are constant over the desired temperature range. All molar enthalpies of formation are at 298.15K. ∆?∘ Mg(g) ? = 147.1 kJ/mol ∆?∘ HCl(g) ? = -92.3 kJ/mol ∆?∘ H2(g) ? = 0 kJ/mol ∆?∘ MgCl2(s) = -641.3 kJ/mol Cp,m Mg(g) = 20.8 J mol-1 K-1 Cp,m HCl(g) = 29.1 J mol-1 K-1 Cp,m H2(g) = 28.8 J...
Question 34 of 50 Submit Using the equations Si(S) + 2Cl2 (9) - SICI. (S) AH = -640.1 kJ/mol 2 Fe (s) + 3 Cl2 (g) - 2 FeCl (s) AH = -800.0 kJ/mol Determine the enthalpy for the reaction 3 SICIA (S) + 4 Fe (s) – 4 FeCl, (s) + 3 Si (S) kJ/mol 1 2 3 C +/- : 0 x 100 Question 34 of 50 Submit Using the equations Si(S) + 2Cl2 (9) - SICI. (S)...
Consider the following reaction: 2 HCl(aq) + 1 Mg(s) → 1 MgCl2(aq) + 1 H2(g) ΔH°rx = -465.8 kJ Determine the amount of heat released, in kJ, of each of the following scenarios. Give each answer to 2 decimal places. (a) 10.69 g of Mg(s) is reacted with excess HCl(aq)· (c) 1.17 g of H2(g) is produced from the reaction after completion. (b) Excess Mg(s) is added to 440 mL of 0.996 M of HCl(aq)· (d) 580 mL of a...
Question 3 10 points The reaction 4Al (s)+302 (g) 2 Al203 (s) AH 851 k is and therefore heat is by the reaction. exothermic, absorbed endothermic, absorbed endothermic, released exothermic, released thermoneutral, neither released nor absorbed
Using the Hess Law and the thermochemical equations below, MgO(s) + + 2HCl(aq) ------> MgCl2(g) + H2O(l) ΔHrxn = -111.7 kJ/mol Mg(s) + 2 HCl(aq) ------> MgCl2(g) + H2(g) ΔHrxn = -548.3 kJ/mol H2(g) + 1/2 O2(g) ------> H2O(l) ΔHrxn = -142.9 kJ/mol find the heat of reaction of the following: (0.25 pt.) Mg(s) + 1/2 O2(g) ------> MgO(g) ΔHrxn = ? b) If the theoretical enthalpy of this reaction is -602 kJ/mol,...