a) Write out Net Ionic Equation for reaction 1 and 2 and show AH for each Reaction 1: AH1:-653528 KT H*laql+ OH"laq)- → H,0le) AH;: -491.3004LKJ Reaction 2: +2H* Mg +Hg) 2+ (aq) lag) b) Use reactions 1 and 2 and Hess' law to find the AH for reaction 3, given here: Mg(s) + 2H2O(1) → Mg ²" (ag) + 20H (ag) + H2(g) AH3, Hess' Law : c) Use the net ionic equation for reaction 3 to look up the AHf values in your textbook. Use these values to calculate a theoretical value for AH3 or the "textbook" calc. Mglsi+2H,0(4)→Mg* lag) + 20HT ag) + Halg)
a) Write out Net Ionic Equation for reaction 1 and 2 and show AH for each Reaction 1: AH1:-653528 KT H*laql+ OH"laq)- → H,0le) AH;: -491.3004LKJ Reaction 2: +2H* Mg +Hg) 2+ (aq) lag) b) Use reactions 1 and 2 and Hess' law to find the AH for reaction 3, given here: Mg(s) + 2H2O(1) → Mg ²" (ag) + 20H (ag) + H2(g) AH3, Hess' Law : c) Use the net ionic equation for reaction 3 to look up the AHf values in your textbook. Use these values to calculate a theoretical value for AH3 or the "textbook" calc. Mglsi+2H,0(4)→Mg* lag) + 20HT ag) + Halg)
Chemistry
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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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I just was wondering how to use these equations at the top to find the H for the 3rd reaction in part b. Thanks!
Transcribed Image Text:15
4) Verifying Hess's Law
a) Write out Net Ionic Equation for reaction 1 and 2 and show AH for each
Reaction 1:
AH::-653528 KJ
H*laql+ OH"laq)→ H,0(2)
AH;: -491.3004LKJ
Reaction 2:
Mals)+2Ht Mg +H, (g)
laq)
laq'
b) Use reactions 1 and 2 and Hess’ law to find the AH for reaction 3, given here:
Mg(s) + 2H2O(1) → Mg ²* (ag) + 20H (ag) + H2(g)
AH3, Hess' Law :
c) Use the net ionic equation for reaction 3 to look up the AHf values in your textbook. Use
these values to calculate a theoretical value for AH3 or the "textbook" calc.
Mg(s)+2H,0(4)
→ ag) + Hzlg)
Mglag)+20HT
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