What is the boiling point of ethanol?

What is the boiling point of ethanol?

• A. 78.3 °C
• B. 100 °C
• C. 95 °C
• D. 80 °C

Answer: (A)

The boiling point of ethanol is approximately 78.3 °C under standard atmospheric pressure. This value reflects the temperature at which the vapor pressure of ethanol equals the atmospheric pressure, allowing it to transition from liquid to vapor. Ethanol, a common alcohol used in various applications including beverages, antiseptics, and solvents, has a relatively low boiling point compared to many other organic compounds. In the context of the options presented, this specific boiling point is characteristic of ethanol’s molecular structure, which consists of a hydroxyl group (-OH) that influences its physical properties. Understanding the boiling point of ethanol is not only significant for practical applications but also serves as a foundational concept in the study of thermodynamics and phase transitions in chemistry. The other options do not accurately reflect the boiling point of ethanol.

The boiling point of ethanol is approximately 78.3 °C under standard atmospheric pressure. This value reflects the temperature at which the vapor pressure of ethanol equals the atmospheric pressure, allowing it to transition from liquid to vapor. Ethanol, a common alcohol used in various applications including beverages, antiseptics, and solvents, has a relatively low boiling point compared to many other organic compounds.

In the context of the options presented, this specific boiling point is characteristic of ethanol’s molecular structure, which consists of a hydroxyl group (-OH) that influences its physical properties. Understanding the boiling point of ethanol is not only significant for practical applications but also serves as a foundational concept in the study of thermodynamics and phase transitions in chemistry.

The other options do not accurately reflect the boiling point of ethanol.