Part 1) Use the following equations to calculate the heat of the reaction for the formation of ethane (C2H6).
| C2H6(g) + 7/2 O2(g) → 2CO2(g) + 3 H2O(l) | ∆ Ho = -1560 kJ | |
| C(gr) + O2(g) → CO2(g) | ∆ Ho = -394 kJ | |
| H2(g) + 1/2 O2(g) → H2O(l) | ∆ Ho = -286 kJ |
Calculate ∆Ho for the following reaction:
2 C(gr) + 3H2(g) → C2H6(g)
ethane
Use kJ for your answer.
ΔHo =
Part 2) Find the heat of formation for a mole
of sulfuric acid given:
| SO3(g) + H2O(l) → H2SO4(l) | ∆ Ho = -132.6 kJ | |
| H2(g) + 1/2O2(g) → H2O(l) | ∆ Ho = -285.8 kJ | |
| S(s) + 3/2O2(g)→SO3(g) | Δ Ho= -395.6 kJ |
Use kJ and 3 significant figures for your answer.
ΔHof of sulfuric acid =

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Part 1) Use the following equations to calculate the heat of the reaction for the formation...
Using the standard molar heat of combustion of hydrogen, methane, and ethane (given below), find the enthalpy change for 2CH4(g) → C2H6(g) + H2(g) H2 + ½ O2 → H2O ΔHo = -285.8 kJ CH4 + 2O2 → CO2 + 2H2O ΔHo = -890.4 kJ C2H6 + (7/2)O2 → 2CO2 + 3H2O ΔHo = -1559.9 kJ
Calculate the change in enthalpy (ΔH) for the heat of formation of ethane, C2H6, using Hess' Law and the following reactions:a) 2C(S) + 2O2(g) → 2CO2(g), ΔH = -188 kcalb) C2H6(g) + (7/2)O2(g) → 2CO2(g) + 3H2O(l), ΔH = -373 kcalc) H2(g) + (1/2)O2(g) → H2O(l), ΔH = -68.3 kcal
problem is together.
3. Calculate the enthalpy of formation of carbon dioxide in the following reaction: C(s) + O2(g) - CO, (g) Use the following equations: a) H2O(l) → H2(g) + 2O2(g) AH°-= +285.8 kJ/mol b) C2H6(g) → 2C (s) + 3H2(g) AH'= +84.7 kJ/mol c) 2CO2 (g) +3H2O (1) C2H6(g) + (7/2) O2(g) AH°F = +1560.7 kJ/mol
Given the thermo-chemical equations and their corresponding enthalpies of reaction: C2H6 (g) + 7/2 O2 (g) --> 2CO2 (g) + 3 H2O (l) ΔHRXN = -1560 kJ/mol 2C2H2 (g) + 5 O2 (g) --> 4 CO2 (g) + 2 H2O (l) ΔHRXN = -2599 kJ/mol H2 (g) + 1/2 O2 (g) --> H2O (l) ΔHRXN = -286 kJ/mol What is the standard enthalpy of reaction for the following? C2H2 (g) + 2 H2 (g) --> C2H6 (g)
Use the following information to calculate the heat of formation of propane C3H8. 3 C (S-Graphite) + 4 H2 (g) —› C3H8 (g) 1. C (S-Graphite) + O2 (g) —› CO2 (g) ΔH = - 393.5 kJ 2. H2 (g) + ½ O2 (g) —› H2O (l) ΔH = - 285.8 kJ 3. C3H4 (g) + 4 O2 (g) —› 3 CO2 (g) + 2 H2O (l) ΔH = - 1937 kJ 4. C3H6 (g) + 9/2 O2 (g) —›...
Use the given standard enthalpies of formation to determine the heat of reaction of the following reaction: 2 C5H10O(g) + 19 O2(g) => 10 CO2(g) + 10 H2O(g) ΔHof C5H10O(g) = -232.11 kJ/mol Δ Hof CO2(g) = -393.5 kJ/mol ΔHof H2O(g) = -241.8 kJ/mol
1. Calculate AH for the reaction C2H4 (8) + H2() → C2H6), from the following data. C2H4 (g) + 3 02 (®) → 2 CO2 (s) + 2 H20 (1) C2H6 (g) + 7/2 02(g) → 2 CO2(g) + 3 H20 (1) H2 + 1/2O2() → H20 (1) AH = -1411. kJ/mole AH = -1560. kJ/mole AH = -285.8 kJ/mole 2. Calculate AH for the reaction 4 NH3(g) +502 (g) → 4 NO(g) + 6 H20 (g), from the following...
1) C2H6 (g) -----> C2H4 (g) + H2 (g) ΔH1 = ? 2) C2H6 (g) + 3.5O2 (g) -----> 2CO2 (g) + 3H2O (l) ΔH2 = -1560 kJ/mo 3) C2H4 (g) + 3O2 (g) -----> 2CO2 (g) + 2H2O (l) ΔH3 = -1411 kJ/mol 4) 2H2O (l) -----> 2H2 (g) + O2 (g) ΔH4 = 571.6 kJ/mol How much heat is transferred between the system and the surroundings when 25 grams of ethane (C2H6) decomposes to produce ethylene (C2H4) and...
1. From the following equations and enthalpies, determine the molar heat of formation of HNO2(aq) . NH4NO2(aq) → N2(g) + 2H2O(l) ∆H = -320.1 kJ NH3(aq) + HNO2(aq) → NH4NO2(aq) ∆H = -37.7 kJ 2NH3(aq) → N2(g) + 3H2(g) ∆H = +169.9 kJ H2(g) + 1/2 O2(g) → H2O(l) ∆H = -285.8 kJ
Heat of Formation Calculations: 32) Use a standard enthalpies of formation (Ho) table to determine the change in enthalpy for each of these reactions Hrxn [n. Ho(products) - n. Ho(products)] CO (g): -110.5 kJ/mol; CO2 (g): -393.5 kJ/mol CH4 (g): -890.4 kJ/mol H2O (l): -285.8 kJ/mol; H2O (g): -241.8 kJ/mol H2S (g): -20.6 kJ/mol; NO: -90.2 kJ/mol NO2: +33.9 kJ/mol; HCl (g): -92.3 kJ/mol NaOH (s): -426.7 kJ/mol; SO2 (g): -296.8 kJ/mol a) CH4(g) + 2 O2(g) ---> CO2(g) +...