PLEASSSEEE HELP The energy density of compressed natural gas (CNG) held at 3600 psi pressure (about 245x atmospheric pressure) is 2500 kWh/L. Compare the energy density of methane (natural gas is ~ 94% methane) you estimated in the table above to the energy density of CNG at 3600 psi. Explain why the two values are different (you will have to do some unit conversions to answer this question).