5. Using standard heats of formation, calculate AH for 4 FeO (s) + O2(g) → 2 Fe2O3 (s) AH1 of FeO (s) = -272.0 kJ/mol AHºf of Fe2O3 (s) = -825.5 kJ/mol 3. Given 3 C (s) + 4 H2(g) → C3H8 (9) AH = -103.85 kJ/mol C(s) + O2(g) + CO2(g) AH = -393.5 kJ/mol H2 (g) + 12 O2(g) → H2O (1) AH = -285.8 kJ/mol find AH for C3H8 (g) + 5 O2(g) → 3 CO2 (g)...
Using standard heats of formation calculate AH for 4 FeO (s) + O2 (g) 2 Fe Os (s) AHr of FeO (s) - -272.0 kJ/mol 5 AH'T of Fe2O3 (s) = -825.5 kJ/mol
Calculate AH for the reaction 2 KCIO: (s) → 2 KCl (s) + 3 O2 (g) ΔH°r of KCIO3 (s) = -397.7 kJ/mol ΔH°r of KCI (s) = -436.5 kJ/mol
Hess's Law Practice Find AH° for the following equation: SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(g) Using the following equations: Si(s) + O2(g) → SiO2(s) Si(s) + 2F2(g) → SiF4(g) H2(g) + F2(g) → 2HF(g) H2(g) + 4202(g) → H2O(g) AH = -910.9 kJ/mol rxn AH = -1651 kJ/mol rxn AH = -542 kJ/mol rxn AH = -241.8 kJ/mol rxn
12) Use the following data to calculate the standard heat (enthalpy) of formation, ???, of manganese(IV) oxide, MnO2 (s). 2MnO2(s)--2MnO(s) + O2(g) MnO2(s) + Mn(s)- 2Mn0(s) ??-264 kJ ?? -240 kJ 13) Calculate the ??0nn for the following reaction. (Arf [SiO2(s)--910.9 kJ/mol; APf [SiCl4(g)]--657.0 kJ/mol; ??'f [HCI(g)1--92.3 kJ/mol; ? Hof [H2O(g),- -241.8 kJ/mol) SiO2(s) + 4HCI(g)-SiCI(g) + 2H2O(g)
Given the data in the table below, determine Hrxn for the following reaction. 18. Given the data in the table below, determine AH for the following reaction: rxn SiCla (g) + 2 H20 (g) SiO2 (s)4 HCI (g) AH: (kJ/mol) Substance SiO2 (s) HCI (g) SiCla (g) H2O (g) -910.9 -92.3 -657.0 -241.8 A. -598.9 kJ B. +139.5 kJ C. -139.5 kJ D. +1106.7 kJ E. +598.9 kJ
The combustion of lauric acid is given by the following thermochemcial equation: CH3(CH2)10COOH(s) + 18 O2(g) → 12 H2O(l) + 12 CO2(g) Hcomb is −7377 kJ mol−1 Using the heats of formation for CO2(g) and H2O(l) calculate the heat of formation (△fH) of lauric acid. △fH△ CO2(g) = −393.5 kJ mol−1 fH H2O(l)= −285.8 kJ mol−1 19. The combustion of lauric acid is given by the following thermochemcial equation: CH3(CH2)10COOH(s) + 18 O2(g) → 12 H2O(l) + 12 CO2(g) AH...
2. Consider the following three reactions: 2 Fe (s) +6 HCI (aq)-2 FeCls (aq) +3 H2 (g) AH, Fe:Os (s)+6 HCI (aq)2 FeCls (aq) + 3 H2O () AHa 2 H2 (g) +O2 (g)2 H2O () AHc Show how these equations must be summed together according to Hess's Law to determine AH for the combustion of iron (target equation shown below). Also show clearly how the AH values of each of the three reactions must be manipulated to determine the...
Practice with Hess's Law and Standard Heats of Formation 1. (Example) The reaction C He(g) + 6 F2 (g) → 2 CF4(g) + 4 HF (9) can be written as the sum of: CH4 (9) ► 2 C(s) + 2 Ha(o) AH = -52.3 kJ/mol 2 C(s) + 4 Faq) → 2 CF4g) SH -1380 kJ/mol 2 Haq) + 2 Fala) > 4 HF HE.1074 kJimol CsHe(g) + 6 F2 (g) → 2 CF.(g) + 4 HF (g) AH =...
For the reaction C2H4(g) + Cl2(g) C2H4C12(1), determine AH°, given that 2 Cl2(g)2 H2O(I) 4 HCl(g)O2(g) -202.4 kJ mol1 1 2 HCI(g) + C2H4(g) +O28) 1 -318.7 kJ mol C2H4C12(1) H2O(1) AH°