What property of acetone makes it useful as a degreaser?

Question

BlackTom AI · Accepted Answer

Acetone's effectiveness stems from its strong solvent power combined with rapid evaporation.

1. Relevant knowledge points and concepts
- Solubility and "like dissolves like": solvents dissolve solutes with similar polarity.  
- Acetone is a polar aprotic solvent (carbonyl group with two methyl groups), which gives it the ability to dissolve a wide range of organic compounds, including nonpolar hydrocarbons found in grease.  
- Volatility: acetone has a low boiling point (~56°C) and evaporates quickly, leaving little residue.

2. Step-by-step reasoning
- Grease and oils are primarily nonpolar hydrocarbon chains and triglycerides that are poorly soluble in water.  
- A solvent that can interact with these nonpolar components is needed. Although acetone is polar, its two methyl groups provide nonpolar character and the carbonyl makes it a good hydrogen-bond acceptor—overall enabling solvation of many organic (both slightly polar and nonpolar) molecules.  
- When acetone contacts grease, its molecular interactions (dipole–induced dipole and dispersion forces) disrupt the cohesive forces holding the grease together and solvate the hydrocarbon chains. This dissolves and disperses the grease into the solvent.  
- The dissolved grease can then be wiped or rinsed away; acetone’s high volatility means it evaporates quickly, accelerating drying and leaving little residue.

3. Intermediate “steps” (conceptual)
- Identify grease composition → select solvent that interacts with hydrocarbons → acetone’s molecular structure allows such interaction → grease dissolves → solvent evaporates.

4. Why the correct answer is correct
- The property that directly enables degreasing is acetone’s ability to dissolve grease (its solvent power for organic, oily substances) combined with quick evaporation, which makes it practical for cleaning.

5. Why other possible answers would be incorrect (brief)
- It does not primarily chemically react with grease; it dissolves it.  
- Being simply polar or simply nonpolar alone would not explain the broad solvency; water (polar) cannot dissolve grease effectively.  
- Its flammability or smell are disadvantages, not reasons it degreases.

6. Conclusion
- Therefore, acetone is useful as a degreaser because it removes grease from fabric by dissolving it and evaporating quickly, confirming the provided answer.

What property of acetone makes it useful as a degreaser?单项选择题

类似问题

Which if the following properties of water refers to its ability to dissolve many substances?

HVLP guns are known for high material transfer efficiency. What does this mean?

What was the standard finish used to protect and color fabric on early aircraft?

What will happen if you wipe a rag soaked in MEK on an acrylic finish?

Why is newspaper not recommended for masking when painting?

What is one requirement for using fabric to cover an aircraft?

Why is surface preparation considered the most critical step in any aircraft painting project?

What health risk is associated with prolonged exposure to toluene vapors?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单