|MadSci Network: Engineering|
The concentration of the components determine the energy content of the liquid or gaseous fuel. Without the concentrations of the mixtures, the task would be fairly difficult to predict heating values.
Converting between weight and volume are fairly straight forward calculations with the density of the fuel. You may try comparing the gaseous volumes by converting the liquid LPG to gas.
If you have the ability, please see the ASTM Standard D3588 The Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels.
Take a few moments and review the Gas Laws. These may help you grasp the conversions between volumes and concentrations.
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