1. What is LPG Gas Density?

Definition: This calculator computes the density of LPG (Liquefied Petroleum Gas) using the ideal gas law, accounting for pressure, molar mass, and temperature.

Purpose: It helps engineers and technicians determine LPG density for storage, transportation, and usage calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density of LPG (kg/m³)
• \( P \) — Pressure (Pascals)
• \( M \) — Molar mass (kg/mol, 0.044 for propane)
• \( R \) — Universal gas constant (8.314 J/(mol·K))
• \( T \) — Temperature (Kelvin)

Explanation: The formula relates gas density to its pressure and temperature through the ideal gas law.

3. Importance of LPG Density Calculation

Details: Accurate density calculations are crucial for proper vessel sizing, safety considerations, and operational efficiency in LPG systems.

4. Using the Calculator

Tips: Enter the pressure in Pascals (default 101325 Pa for STP), molar mass (default 0.044 kg/mol for propane), and temperature in Kelvin (default 273.15 K for 0°C). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's typical LPG density at STP?
A: LPG (propane) density is typically 1.8–2.0 kg/m³ at standard temperature and pressure (STP).

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

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

Q4: What's the molar mass for different LPG types?
A: Propane ≈ 0.044 kg/mol, Butane ≈ 0.058 kg/mol, Mixes vary between these values.

Q5: When is the ideal gas law not accurate for LPG?
A: At high pressures or near the liquefaction point, real gas behavior deviates from ideal.