1. What is Density of Liquid Hydrogen?

Definition: Density (ρ) is mass per unit volume, and for liquid hydrogen it's approximately 70.8 kg/m³ at its boiling point (-252.9°C).

Purpose: This calculator helps determine the density of liquid hydrogen given its mass and volume, important for cryogenic storage and fuel applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density (kg/m³)
• \( m \) — Mass (kg)
• \( V \) — Volume (m³)

Explanation: The mass of hydrogen is divided by its volume to calculate density. For liquid hydrogen at -252.9°C, this is typically ~70.8 kg/m³.

3. Importance of Liquid Hydrogen Density

Details: Knowing the density is crucial for designing storage tanks, calculating fuel requirements, and ensuring proper handling of cryogenic liquids.

4. Using the Calculator

Tips: Enter the mass in kilograms and volume in cubic meters. The calculator will compute the density in kg/m³. Default value shows standard liquid hydrogen density.

5. Frequently Asked Questions (FAQ)

Q1: Why is liquid hydrogen's density so low?
A: Hydrogen is the lightest element, and even in liquid form at cryogenic temperatures, its molecules are far less dense than other liquids.

Q2: How does temperature affect liquid hydrogen density?
A: Density increases slightly as temperature decreases towards the boiling point (-252.9°C). Above this temperature, it becomes a gas.

Q3: How does this compare to water density?
A: Water has a density of ~1000 kg/m³, making liquid hydrogen about 1/14th as dense as water.

Q4: What are typical applications needing this calculation?
A: Rocket fuel systems, hydrogen storage for fuel cells, cryogenic research, and industrial hydrogen processing.

Q5: How accurate is the standard 70.8 kg/m³ value?
A: This is accurate at standard boiling point, but exact density varies slightly with purity and exact temperature/pressure conditions.