1. What is Methane Gas Density?

Definition: This calculator computes the density of methane gas (CH₄) using the ideal gas law.

Purpose: It helps engineers, chemists, and researchers determine methane density at various pressures and temperatures.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density of methane (kg/m³)
• \( P \) — Pressure (Pascals)
• \( M \) — Molar mass of methane (0.016 kg/mol)
• \( R \) — Universal gas constant (8.314 J/(mol·K))
• \( T \) — Temperature (Kelvin)

Explanation: The formula derives from the ideal gas law, relating pressure, temperature and molar mass to density.

3. Importance of Methane Density Calculation

Details: Accurate density values are crucial for gas storage, pipeline design, energy calculations, and safety assessments.

4. Using the Calculator

Tips: Enter pressure in Pascals (101325 Pa = 1 atm) and temperature in Kelvin (273.15 K = 0°C). Default values show STP conditions.

5. Frequently Asked Questions (FAQ)

Q1: What's the density at standard conditions?
A: At STP (101325 Pa, 273.15 K), methane density is ~0.717 kg/m³.

Q2: How does temperature affect density?
A: Density decreases as temperature increases (inverse relationship).

Q3: How does pressure affect density?
A: Density increases linearly with pressure (direct relationship).

Q4: Is this accurate for high pressures?
A: The ideal gas law works best at low-moderate pressures. For high pressures, use real gas equations.

Q5: What's methane's molar mass?
A: 16 g/mol (0.016 kg/mol) as CH₄ contains 1 carbon (12) and 4 hydrogens (1 each).