## I was trying to determine density o

## I was trying to determine density o

(OP)

I was trying to determine density of the following chemicals:

1) Natural gas

2) Diesal

3) Propane

Also, what type of firing (front, tangential, opposed) for most space heaters, boilers, hot water heaters?

1) Natural gas

2) Diesal

3) Propane

Also, what type of firing (front, tangential, opposed) for most space heaters, boilers, hot water heaters?

## RE: I was trying to determine density o

^{3}.The density of liquid propane at 15-20 °C is 505 kg/m

^{3}.The density of any gas will vary with the molecular weight, temperature and pressure of the gas. The following equation can be used to calculate gas densities in kg/m

^{3}:kg/m

^{3}= (MW / 0.082057) (atm / °K)where:

MW = molecular weight of the gas

atm = absolute pressure of the gas, in atmospheres

°K = temperature of the gas in °K = 273 + °C

As an example, assuming the gaseous propane (MW = 44) is at 20 °C and at 1 atmosphere of pressure:

kg/m

^{3}= (44 / 0.082057) (1 /293) = 1.83As another example, natural gas is usually about 95% or more of methane. Assuming it is 100% methane (MW = 16) and that it is at 20 °C and at 1 atmosphere of pressure:

kg/m

^{3}= (16 / 0.082057) (1 /293) = 0.67You can plug in your actual gas temperatures and pressures into the above equation and thus calculate your gas densities.

Milton Beychok

mbeychok@xxx.net (replace xxx with cox)

(Visit me at www.air-dispersion.com)