1. What is Ethanol Density?

Definition: Ethanol density refers to the mass per unit volume of ethanol, typically measured in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Standard Value: At 20°C, pure ethanol has a density of approximately 0.789 g/mL or 789 kg/m³.

2. How Does the Density Conversion Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density in g/mL
• \( \rho_{kg/m³} \) — Density in kg/m³

Explanation: Since 1 kg/m³ equals 0.001 g/mL, we divide the kg/m³ value by 1000 to convert to g/mL.

3. Importance of Ethanol Density

Details: Knowing ethanol density is crucial for:

• Preparing accurate solutions in laboratories
• Industrial production processes
• Fuel blending and energy calculations
• Quality control in beverage production

4. Using the Calculator

Tips: Enter the density value in kg/m³ (default 789 kg/m³ for pure ethanol at 20°C). The calculator will automatically convert it to g/mL.

5. Frequently Asked Questions (FAQ)

Q1: Why does ethanol density change?
A: Ethanol density varies with temperature and purity. Higher temperatures decrease density, while water content increases it.

Q2: What's the density of 70% ethanol?
A: Approximately 0.885 g/mL at 20°C (varies slightly with exact composition).

Q3: How does temperature affect ethanol density?
A: Density decreases by about 0.1% per °C temperature increase (0.789 g/mL at 20°C becomes ~0.781 g/mL at 25°C).

Q4: Why measure density in both g/mL and kg/m³?
A: g/mL is common in chemistry labs, while kg/m³ is standard in engineering and industrial applications.

Q5: How accurate is this conversion?
A: The conversion is mathematically exact (1 kg/m³ = 0.001 g/mL), but actual ethanol density depends on purity and temperature.