use property A as a fuel it burns, releasing energy B as a solvent it is insoluble in water C as a fuel it does not burn D in car batteries it is a strong a...
Question 1 Report
| use | property | |
|---|---|---|
| A | as a fuel | it burns, releasing energy |
| B | as a solvent | it is insoluble in water |
| C | as a fuel | it does not burn |
| D | in car batteries | it is a strong acid |
Ethanol has several important uses. Which row of the table correctly matches a use of ethanol with the property that makes it suitable for that use?
Answer Details
A correct row needs a property that is both true of ethanol and the actual reason for the use.
Ethanol is a flammable liquid that burns in air to release energy, \( \mathrm{C_2H_5OH + 3O_2 \rightarrow 2CO_2 + 3H_2O} \), so the row linking use as a fuel with burning to release energy is the correct pairing. The other fuel row contradicts itself by claiming ethanol does not burn. The solvent row fails on the property rather than the use, because ethanol mixes with water in all proportions, so calling it insoluble is false; that miscibility is part of why it is such a useful solvent. Ethanol is not a strong acid either, and it is sulfuric acid that car batteries contain.
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