How many kilojole per hr in 62.7 kilomol per hr of natural gas?

Answer 1

Since both units are per hour, we can omit them, that leaves us with

? kJ / 62.7 kmol nat. gas.

Natural gas is usually a combination of gases, primarily methane, with some parts ethane and propane, and trace amounts of heavier hydrocarbons, sulfur, and other compounds.

You also need to specify which type of "energy" you are after. In chemical engineering, we use several different definitions. The one you are probably after is how much heat you would get if you burned the gas, its heat of combusion.

So, assuming that natural gas is almost completely methane, and you want to know how much energy you get from burning it, you can find through a site like NIST Chemistry Webbook. In this case, we'll use (delta)Hc = -890.7 kJ/mole.

Solve for: -890.7 kJ/mol * 62.7 kmol * 1000 mol/kmol = x kJ

If you are instead looking for how much energy is contained in the gas, you can lookup methane's specific enthalpy. Be aware that this number changes with temperature, pressure and phase.

Oh, and lastly -- the unit is kiloJoule. A jole is a different and very obscure unit.