2NO2(g) AH=-113.1 kJ. If AH for 3. Consider the reaction: 2NO(g) + O2(g)_ NO2 is 33.8 kJ/mole, calculate AH°r for NO 1S

Using the provided table and the equation below, determine the heat of formation for PbS. 2 PbS (s) + 3 02 (g) → 2 SO2 (g) + 2 PbO (s) AH° = -828.4 kJ/mol |kJ/mol Substance AH (kJ/mol) O2 (g) 1 2 3 SO2 (g) -296.9 4 6. C PbO (s) -217.3 7 8 9. +/- х 100 +

6. Find AH for the following reaction: Fe2O3 (s) + 3 CO (g) → 2 Fe (s) + 3 CO₂ (g) Use these reactions and AH's: 4 Fe (s) + 3 O₂ (g) → 2 Fe₂O3 (s) CO (g) + O2 (g) → CO₂ (g) AH= -1648 kJ ΔΗ= -283 kJ 7. Find AH for the following reaction: C6H12O6 (s) 2 C₂H5OH (l) + 2 CO2 (g) The standard enthalpies of formation are: 6 C (s) + 6 H₂(g) + 3 O2(g) → C6H12O6 (S) 2 C(s) + 3 H₂(g) + O2(g) → C₂H5OH (l) C(s) + O₂ (g) → CO₂ (g) 8. Hydrazine, N₂H4, is a rocket fuel. Calculate the AH combusted according to the equation: 2N₂H4 (g) → 2M

2. Use the standard reaction enthalpies given below to determine AH°rxn_for the following reaction: 2NO (g) + O2 (g) → 2NO2 (g); AH°xn = ? Given: N2 (g) + O2 (g) → 2NO (g) AH°rxn = 183 kJ ½ N2 (g) + O2 (g) → NO2 (g) AH°rxn = 33 kJ

2) Why is AH used? Consider the following reaction taking place at constant temperature 298 K Na (s) + H₂O (1)→ NaOH (aq) + H₂ (g) If 28.0 g of Na is used in the reaction and q, is measured to be -368 kJ. determine AH (in kJ/mol) and AU (in kJ/mol). From the values obtained, find the percent difference

Use the following information to answer the next question. Nitrous acid is an unstable compound. One method of preparation is the oxidation of ammonia with hydrogen peroxide: NH3(g) + 3H₂O₂(1)→ HNO₂(aq) + 4H₂O(1) AH 613 kJ The standard molar enthalpy of formation of nitrous acid is calculated to be Record your 3-digit answer. Include sign; do not include units. ◆ kJ/mol.

[References] The reusable booster rockets of the space shuttle use a mixture of aluminum and ammonium perchlorate as fuel. A possible reaction is 3A1(s) +3NH,CIo,(s) → Al,0,(s) + AlCls (s) + 3NO(g) + 6H2O(g) Calculate AH for this reaction. Substance and State AH; (kJ/mol) Al(s) Al2O3 (s) AICI3 (s) H20(g) NO(g) NH CIO.(s) -1676 -704 -242 90. -295 AH: kJ Submit Answer Try Another Version 1 item attempt remaining Prev

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Use the standard reaction enthalpies given below to determine Hᵒrxn for the following reaction: Given: 2 NO(g) + O2(g) → 2 NO2(g) N2(g) + O2(g) → 2 NO(g) 1/2N2(g) + O2(g) → NO2(g) -150. KJ -117 kJ -333 kJ +115 kJ +238 kJ AH°, rxn AHᵒr = ? rxn +183 kJ AH°rxn = +33 kJ

You are given the follwing themochemical data: Reation one: Pb(s) + 1/2 O2(g)--> PbO(s)    Hrxn1=-219kJ Reaction Two: C(s,graphite) + O2(g)--> CO2(g)   Hrxn2= -394kJ Reaction Three: PbCO3(s)--> PbO (s) + CO2(g)  Hrxn3= 86kJ Reaction Four: Pb (s) + C(s, graphite) + 3/2 O2 (g)--> PbCO3(s)  Hrxn= ? Based on the equation above how much heat is involved when 32g of oxygen gas reacts to produce lead (2) carbonate?