If 100.0 mL or 0.750 M HBr and 50.00 mL of 1.00 M NH4OH are mixed in a calorimeter, the temperature goes from 19.0ºC to 301K. You can assume the specific heat and density of the solution to be the same as water. What is the enthalpy change of the reaction: 2HBr (aq) + NH4OH (aq) H2O (l) + NH4Br (aq)? Using the given information: C (s) + O2 (g) CO2 (g) = -394 kJ ΔH C3H8 (g) + 5O2 (g) 4H2O (l) + 3CO2 (g) = -2220 kJ ΔH H2 (g) + 1/2 O2 (g) H2O (l) = -286 kJ ΔH Find for the reaction: ΔH 3C (s) + 4H2 (g) C3H8 (g) = ? ΔH Calculate the for the following equation using the enthalpies of formation? ∆Hrxn 3 PbBr2 (s) + 4 H2O (l) Pb3O4 (s) + 6 HBr (g) + H2 (g) Molecule (kJ/mol) ∆Hfº HBr (g) -36.2 H2O (g) 241.8 H2O (l) -285.8 PbBr2 (s) -277.0 Pb3O4 (s) -734.7 Write the formation reactions for the following: HBr SO3 Pb(NO3)2
If 100.0 mL or 0.750 M HBr and 50.00 mL of 1.00 M NH4OH are mixed in a calorimeter, the temperature goes from 19.0ºC to 301K. You can assume the specific heat and density of the solution to be the same as water. What is the enthalpy change of the reaction: 2HBr (aq) + NH4OH (aq) H2O (l) + NH4Br (aq)? Using the given information: C (s) + O2 (g) CO2 (g) ΔH = -394 kJ C3H8 (g) + 5O2 (g) 4H2O (l) + 3CO2 (g) ΔH = -2220 kJ H2 (g) + 1/2 O2 (g) H2O (l) ΔH = -286 kJ Find ΔH for the reaction: 3C (s) + 4H2 (g) C3H8 (g) ΔH = ? Calculate the ∆Hrxn for the following equation using the enthalpies of formation? 3 PbBr2 (s) + 4 H2O (l) Pb3O4 (s) + 6 HBr (g) + H2 (g) Molecule ∆Hfº (kJ/mol) HBr (g) -36.2 H2O (g) 241.8 H2O (l) -285.8 PbBr2 (s) -277.0 Pb3O4 (s) -734.7 Write the formation reactions for the following: HBr SO3 Pb(NO3)2
CHEM_177__14-25__Appy_ghugunin_Exam_2_Review.docx