Why does evacuation increase evaporation ? Please tell me the reason for this . Why does evacuation increase evaporation ? Please tell me the reason for this . will und will greatly enham•e by A. it Share with your friends Share 0 Decoder_2 answered this Dear student,The evacuated chamber will give larger area for the evaporation process to occur.As we know the rate of evaporation increases when area exposed to evaporation is increased, the evacuated chamber will do the same.Hence the rate will increase.Regards -1 View Full Answer