Use the following data to calculate the standard enthalpy of formation of solid strontium carbonate SrCO3 (s)→ SrO (s) + CO₂(s) AH of CO₂ (g) = -394 kJ/mol -1812 kJ -752 kJ 1812 kJ 752 kJ (Your answer) 1220 -1220 kJ (Correct answer) AH° 234 kJ/mol AH of SrO(s) = -592 kJ/mol

Given the enthalpies for the following reactions: 2 Fe (s) + 3/2 O₂(g) → Fe2O3 (s)Math output error AH₂ ΔΗ, CO (g) + 1/2 O₂ (g) → CO₂ (g) CO2 (g) ΔΗ = -248.7 kJ rxn rxn = 1,091.6 kJ Calculate the enthalpy change (AHrxn) for the following reaction: Fe2O3 (s) + 3 CO (g) → 2 Fe (s) + 3 CO₂ (g)

With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3 (9) + 502 (g) → 4NO(9) + 6H20(g) AH = -906 kJ What is the enthalpy change for the following reaction? NO(9) + H2O(9) → NH3 (9) + O2(g) Enthalpy change : kJ

Given the following reactions Reactions Enthalpies of Reaction 1 Na(s) + Cl2(8) → Na(g) + Cl(g) AH = 257 kJ 2 Na(g) + Cl(g) → Na*(g) + Cl(g) AH = 164 kJ 1 Cl2(g) → Nacl(s) Na(s) + AH = -333 kJ Use Hess' Law to determine the AH for the following reaction: (watch your states and charges) Na*(g) + Cl'(g) → NaCI(s) X kJ

When 6.54 grams of Zn is placed in 500.0 mL of 1.00 M CuSO4(aq) in a coffee cup calorimeter, it reacts completely to displace copper. The temperature of the solution rises from 20.0˚C to 30.4˚C. Assume the coffee cup itself gains no heat and that the solution has the same density (1.00 g/mL) and specific heat (4.184 J/g˚C) as pure water. (a) How much heat does the solution gain during this reaction? (in J)

The standard enthalpy change for the following reaction is -135 kJ at 298 K. 1/2 N2(g) + 1/2 H2(g) + 3/2 O2(g) HNO3(g)       ΔH° = -135 kJ What is the standard enthalpy change for the reaction at 298 K? N2(g) + H2(g) + 3 O2(g)2 HNO3(g) kJ