3. Chemical Reactions

Combustion Analysis

Multiple Choice
How many molecules of water are produced by the complete combustion of 3.00 g of methane (CH_4)?
Multiple Choice
Which of the following are the products formed when methanol (CH3OH) undergoes complete combustion in excess oxygen?
Multiple Choice
Combustion analysis of 63.8 mg of a compound containing carbon, hydrogen, and oxygen produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?
Open Question
Which clue can be used to identify a chemical reaction as a combustion reaction? Oxygen is a product. A hydrocarbon reacts with oxygen. Water and carbon dioxide react. The reaction involves ions.
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Multiple Choice
What is the standard enthalpy change for the combustion of one mole of benzene (C6H6) based on the given reaction: 2 C6H6(l) + 15 O2(g) → 12 CO2(g) + 6 H2O(l); ΔHrxn° = -6534 kJ?
Multiple Choice
When 0.112 g of heptene, C7H14, is burned in a bomb calorimeter, the temperature rises by 4.99 °C. The heat capacity of the calorimeter is 2.46 kJ/°C. Calculate the combustion energy (ΔE) for heptene, C7H14, in kJ/g. Express your answer in kJ/g.
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Multiple Choice
An unknown compound is composed of carbon, hydrogen and oxygen. A 4.30 g sample is ignited and creates 8.59 g CO₂ and 3.52 g H₂O. If the molar mass is 176.22 g/mol, what is the molecular formula?
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Open Question
Rapid oxidation of a substance, accompanied by the production of heat and light.
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Open Question
What else is produced during the combustion of propane, C₃H₈? H₂O, C₃H₈, O₂, C₃H₈O₂.
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