What are the states of chlorine and ethanol at 30°c

Chlorine, the gas, and ethanol, the alcohol do not react together in that form. There is a set of general reactions ROH + HX = RX + H2O where X is a halogen such as chlorine and ROH is the alcohol. RX is known as a haloalkane or alkyl halide. For this reaction to work, HX would need to be something such as concentrated hydrochloric acid. Other reactions - the so-called "chlorine bomb" for instance use bleach and other compounds, not free chlorine.