A gas stream (stream 1) of ethylene (mass fraction 0.40) and propylene (mass fraction 0.60) enters a separator. The entering stream has a flowrate of 1000 m3/h. You can assume that this is an ideal gas at 25 C and 1 bar. There are two exit streams, stream 2 with mostly purified ethylene and stream 3 with mostly purified propylene. Stream 2 recovers 93% of the original mass of ethylene fed into stream 1. The mass fraction of ethylene in stream 3 is 0.1. What is the mass flowrate of outlet stream 3, and what is the mass fraction of propylene in Stream 2

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

the awnser is group 12