When chemists convert ethene (c2h2) to ethanol (ch3ch2oh), they have a mixture of the two gaseous substances. why do chemists then lower the temperature of the mixture? to collect liquid ethene and leave ethanol as a gas because ethene has stronger dipole-dipole forces to collect liquid ethene and leave ethanol as a gas because ethanol has stronger london dispersion forces to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds to collect liquid ethanol and leave ethene as a gas because ethene has stronger london dispersion forces