Question

experiment 9 Post-lab Questions is advised that you wait until next week to submit your results and post-lab questions due to the challenging nature of them. Mess's law is all about utilizing a series of reactions and their AH to determine the AH of an unknown reaction. AH=2829 Mgw + 2HC1,09) -> MgCl2log + H2lo AH = ???? MgO + 2HCl -> MgCl2foo+H,O, Haigl ,026->H,0 AH--285.8kJ/mol Mg(n+7,02/01 -> Mgom AH = 2222 1. What are the standard deviations for your AH values determined with Mg and MgO respectively. Which trial is farthest from your average AH value? 2. What are the averages of your two best AH values from Mg and MgO respectively 3. Rewrite the top two equations with your average AH values. naa

Hrnx MG Hrnx MgO

Trial 1 -1356.2 kJ/mol -645.33 kJ/mol

Trial 2 -1543.9 kJ/mol   -650.62 kJ/mol

Trial 3 -1540.2kJ/mol -655.23 kJ/mol   

Answer 1

oz 107.31 Ryn2 rago(s) + 2 Hua m ach ag + thy ole) Trial s Hron - 645.33 kJ/mol - 650.62 ks/mol aster - 655.23 kr/indl mean() = 1645-33 +680.62 +655-23) - F 650.3948/ml Standard 2 dericton deviation E (K:- 1)? E (Wi-u) 2 1 (645.33-658.39) 41650. 62-650.39) a & (685.23-650639 3-1 Lolni standard deviation (5) for Rent - 107-31 Standard deviation (6) for Ron2 - 4-95 For Poni, trial I (-1356.2 kJ/mol ins for that from the mean rame (-1980. 1 k5/mol) For Dxn 2, Trial 1 (-645.33 kJ/mol is fertheit from the mean value (-650.39 ks/ma)

and 1g of trial 2 Trial 3 Faith For han 1, Aug value of Trial 2 a = 1542.05 kJ/mol I . pa for Ryn2, Aug value of Trial 2 and Trial! = [652.92 kg/mol Solha hu Mg(s) + 2 hug) - ngelley) + Malgs. A won 1480-1 ky mg 0(6) + 2Huy ragel2(aq) + holes Shrer - 650.34 18/mol COM and © M6) + 2 tuag - mgr lag) + tlg); Shain - 1450-148/m) mache+Hole) 2018) + 2Hulky), Akron 8650.39 kg/m Helg) + 1/ 02(9) holes ; shran = -285-8k/mol on adding, we hone, Mg(s) + 12 ingo(s) ohrana - 1115.51 kg/mmy