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Problem #1: The heats of combustion of C (s, graphite), H 2 (g) and CH 4 (g) at 298 K and 1 atm are respectively −393.50 kJ/mol, −285.83 kJ/mol and −890.36 kJ/mol. What is the enthalpy of formation for CH 4? Solution: 1) The three combustion reactions are: 2) The phrase 'enthalpy of formation' tells us this reaction is called for:
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Problem #1: 0.487 grams of quinine (molar mass = 324 g/mol)...
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Problem #1: 0.487 grams of quinine (molar mass = 324 g/mol) is combusted and found to produce 1.321 g CO 2, 0.325 g H 2 O and 0.0421 g nitrogen. Determine the empirical and molecular formulas. Problem #2: 95.6 mg of menthol (molar mass = 156 g/mol) are burned in oxygen gas to give 269 mg CO 2 and 110 mg H 2 O. What is menthol's empirical formula?
28 maj 2020 · What is the enthalpy of combustion per mole of methane under these conditions? a. How much heat is produced when 100 mL of 0.250 M HCl (density, 1.00 g/mL) and 200 mL of 0.150 M NaOH (density, 1.00 g/mL) are mixed? (Refer to Example 8.2.1 for how the heat of this reaction was derived)
28 maj 2020 · Write an equation for the reaction. Write separate equations for the reactions of the solid metals magnesium, aluminum, and iron with diatomic oxygen gas to yield the corresponding metal oxides. (Assume the iron oxide contains Fe 3+ ions.)
Try to solve these problems before watching the solutions in the screencasts. [CH_4 + 2O_2 rightarrow CO_2 + 2H_2O] [CH_4 + frac{3}{2} O_2 rightarrow CO + 2H_2O] Given: Find: https://youtu.be/
After combustion with excess oxygen, a 12.501 g of a petroleum compound produced 38.196 g of carbon dioxide and 18.752 of water. A previous analysis determined that the compound does not contain oxygen. Establish the empirical formula of the compound. 2.3996 mol × 5 = 11.998 ≈ ⎬.
10 sty 2021 · Numerical Problems. Carbon monoxide, a toxic product from the incomplete combustion of fossil fuels, reacts with water to form CO 2 and H 2, as shown in the equation CO(g)+H 2 O(g)⇌CO 2 (g)+H 2 (g), for which ΔH° = −41.0 kJ/mol and ΔS° = −42.3 J cal/(mol·K) at 25°C and 1 atm. What is ΔG° for this reaction?
