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2Mg(s)+O2(g)⟶2MgO(s)     Δ?=−1203 kJ/mol2Mg(s)+O2⁡(g)⟶2MgO(s)⁢     Δ⁢H=−1203 kJ/mol NH3(g)+HCl(g)⟶NH4Cl(s)   Δ?=−176 kJ/molNH3⁢(g)+HCl(g)⟶NH4Cl(s)⁢   Δ⁢H=−176 kJ/mol AgCl(s)⟶Ag+(aq)+Cl−(aq)   Δ?=127 kJ/molAgCl(s)⟶Ag+⁢(aq)+Cl−⁢(aq)⁢   Δ⁢H=127 kJ/mol 2Fe2O3(s)+3C(s)⟶4Fe(s)+3CO2(g)  Δ?=468 kJ/mol2⁢Fe2⁢O3⁡(s)+3C(s)⟶4Fe(s)+3⁢CO2⁢(g)⁢  Δ⁢H=468 kJ/mol C(graphite)+O2(g)⟶CO2(g)  Δ?=−393.5 kJ/molC(graphite)+O2⁡(g)⟶CO2⁢(g)⁢  Δ⁢H=−393.5 kJ/mol CH4(g)+2O2(g)⟶CO2(g)+2H2O(l)Δ?=−891 kJ/mol

2Mg(s)+O2(g)⟶2MgO(s)     Δ?=−1203 kJ/mol2Mg(s)+O2⁡(g)⟶2MgO(s)⁢     Δ⁢H=−1203 kJ/mol NH3(g)+HCl(g)⟶NH4Cl(s)   Δ?=−176 kJ/molNH3⁢(g)+HCl(g)⟶NH4Cl(s)⁢   Δ⁢H=−176 kJ/mol AgCl(s)⟶Ag+(aq)+Cl−(aq)   Δ?=127 kJ/molAgCl(s)⟶Ag+⁢(aq)+Cl−⁢(aq)⁢   Δ⁢H=127 kJ/mol 2Fe2O3(s)+3C(s)⟶4Fe(s)+3CO2(g)  Δ?=468 kJ/mol2⁢Fe2⁢O3⁡(s)+3C(s)⟶4Fe(s)+3⁢CO2⁢(g)⁢  Δ⁢H=468 kJ/mol C(graphite)+O2(g)⟶CO2(g)  Δ?=−393.5 kJ/molC(graphite)+O2⁡(g)⟶CO2⁢(g)⁢  Δ⁢H=−393.5 kJ/mol CH4(g)+2O2(g)⟶CO2(g)+2H2O(l)Δ?=−891 kJ/mol

Chemistry
Chemistry
10th Edition
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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Which of the reactions are exothermic?

2Mg(s)+O2(g)⟶2MgO(s)     Δ?=−1203 kJ/mol2Mg(s)+O2⁡(g)⟶2MgO(s)⁢     Δ⁢H=−1203 kJ/mol
NH3(g)+HCl(g)⟶NH4Cl(s)   Δ?=−176 kJ/molNH3⁢(g)+HCl(g)⟶NH4Cl(s)⁢   Δ⁢H=−176 kJ/mol
AgCl(s)⟶Ag+(aq)+Cl−(aq)   Δ?=127 kJ/molAgCl(s)⟶Ag+⁢(aq)+Cl−⁢(aq)⁢   Δ⁢H=127 kJ/mol
2Fe2O3(s)+3C(s)⟶4Fe(s)+3CO2(g)  Δ?=468 kJ/mol2⁢Fe2⁢O3⁡(s)+3C(s)⟶4Fe(s)+3⁢CO2⁢(g)⁢  Δ⁢H=468 kJ/mol
C(graphite)+O2(g)⟶CO2(g)  Δ?=−393.5 kJ/molC(graphite)+O2⁡(g)⟶CO2⁢(g)⁢  Δ⁢H=−393.5 kJ/mol
CH4(g)+2O2(g)⟶CO2(g)+2H2O(l)Δ?=−891 kJ/mol
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