1. What is the Methane Density Equation?

The methane density equation calculates the density of methane gas using the ideal gas law, modified for methane's specific molar mass. It's useful in chemical engineering, thermodynamics, and gas storage applications.

2. How Does the Calculator Work?

The calculator uses the methane density equation:

Where:

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

Explanation: The equation derives from the ideal gas law (PV = nRT), modified to calculate density by incorporating methane's molar mass.

3. Importance of Methane Density Calculation

Details: Accurate methane density calculations are essential for designing gas storage systems, calculating mass flow rates, and ensuring safety in natural gas applications.

4. Using the Calculator

Tips: Enter pressure in Pascals and temperature in Kelvin. Both values must be positive numbers. For atmospheric pressure, use 101325 Pa.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: This provides a good estimate for ideal conditions. For high pressures or low temperatures, real gas behavior may differ.

Q2: What are typical methane density values?
A: At standard conditions (101325 Pa, 273.15 K), methane density is about 0.716 kg/m³.

Q3: Can I use other pressure units?
A: The calculator requires Pascals. Convert from atm (1 atm = 101325 Pa) or bar (1 bar = 100000 Pa).

Q4: Why is temperature in Kelvin?
A: The gas law requires absolute temperature. Convert from Celsius: K = °C + 273.15.

Q5: Does this work for natural gas?
A: This is for pure methane. Natural gas is a mixture requiring different calculations.