1. What is a Water Boiling Point Under Vacuum Calculator?

Definition: This calculator estimates the boiling point of water at reduced pressures (vacuum conditions) using the Antoine equation.

Purpose: It helps chemists, engineers, and laboratory technicians determine the boiling temperature of water under various vacuum conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Boiling point temperature (°C)
• \( P \) — Pressure (mmHg)

Explanation: This modified Antoine equation provides an accurate relationship between water's boiling point and pressure in the range of 1-760 mmHg.

3. Importance of Boiling Point Under Vacuum

Details: Understanding boiling points at reduced pressures is crucial for vacuum distillation, evaporation processes, and chemical reactions requiring precise temperature control.

4. Using the Calculator

Tips: Enter the pressure in mmHg (between 0.01 and 760). The calculator will compute the corresponding boiling point of water at that pressure.

5. Frequently Asked Questions (FAQ)

Q1: What pressure range is valid for this calculator?
A: The formula works best for pressures between 1 mmHg and 760 mmHg (atmospheric pressure).

Q2: Why does water boil at lower temperatures under vacuum?
A: Reduced pressure lowers the energy needed for water molecules to escape the liquid phase, decreasing the boiling point.

Q3: How accurate is this calculation?
A: The formula provides good estimates (±1°C) for most practical purposes in the specified pressure range.

Q4: What's the boiling point at 1 mmHg?
A: Approximately 6.3°C, meaning water boils just above freezing temperature under strong vacuum.

Q5: Can I use this for other liquids?
A: No, this calculator is specific to water. Other liquids have different Antoine equation parameters.