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18 Nov 2019
Thermochemistry - Problems Set #2 1. CaC2, calcium carbide, can be made by heating calcium oxide with carbon (charcoal). CaO(s) + 3C (s) â CaC2 (s) + CO(g) How much hcat in joules, is absorbed in a reaction in which 2.79 mol C (s) is consumed HP = +464.8 kJ under these conditions? 2. Using standard enthaplies of formation from the appendix to calculate the standard enthalpy change for each of the following reactions (A) NH3 (g) + HCl (g) â NH4Cl (s) (B) NH3 (g) + HNO3 (1) â NH4NO3 (s) (C) MgCl2 (s) + Ca (s) â Mg(s) + CaCl2 (s) (D) FeO(s)) + CO (g) â Fe (s) + CO2 (g) 3. How much heat is required to convert 2.0 mol ice at 0 ° C to stcam at 100 °C? Specific heat of water-4.184 J/g oC. Î Hãfus= 6.01 kJ/mol Î Hovap = 40.67 kJ/mol 4. Use the following equations N2 (g) + 2 O2 (g) -> N204 (8) N2(g) +2O2(g)â2 NO2 (g) HP = + 9.2 kJ AHã= +33.2 kJ to calculate the enthalpy change for the reaction ÎHã! 2NO2 (g) â N204 (g) 5. Use the following equations N2H4 (l) + O2 (g) â N2(g) + 2H2O(1) 2H2(g) + O2(g) â 2H2O(l) H2(g) + O2 (g) âH2O2(1) to calculate the enthalphy change for the reaction N2H4 (1) + 2 H2O2 (l) â N2(g) + 4H20 (l) H' =-622.2 kJ HP =-57 1.6 kJ AHã= ?
Thermochemistry - Problems Set #2 1. CaC2, calcium carbide, can be made by heating calcium oxide with carbon (charcoal). CaO(s) + 3C (s) â CaC2 (s) + CO(g) How much hcat in joules, is absorbed in a reaction in which 2.79 mol C (s) is consumed HP = +464.8 kJ under these conditions? 2. Using standard enthaplies of formation from the appendix to calculate the standard enthalpy change for each of the following reactions (A) NH3 (g) + HCl (g) â NH4Cl (s) (B) NH3 (g) + HNO3 (1) â NH4NO3 (s) (C) MgCl2 (s) + Ca (s) â Mg(s) + CaCl2 (s) (D) FeO(s)) + CO (g) â Fe (s) + CO2 (g) 3. How much heat is required to convert 2.0 mol ice at 0 ° C to stcam at 100 °C? Specific heat of water-4.184 J/g oC. Î Hãfus= 6.01 kJ/mol Î Hovap = 40.67 kJ/mol 4. Use the following equations N2 (g) + 2 O2 (g) -> N204 (8) N2(g) +2O2(g)â2 NO2 (g) HP = + 9.2 kJ AHã= +33.2 kJ to calculate the enthalpy change for the reaction ÎHã! 2NO2 (g) â N204 (g) 5. Use the following equations N2H4 (l) + O2 (g) â N2(g) + 2H2O(1) 2H2(g) + O2(g) â 2H2O(l) H2(g) + O2 (g) âH2O2(1) to calculate the enthalphy change for the reaction N2H4 (1) + 2 H2O2 (l) â N2(g) + 4H20 (l) H' =-622.2 kJ HP =-57 1.6 kJ AHã= ?
Collen VonLv2
23 May 2019