While ethanol is produced naturally by fermentation,

e. g. in beer- and wine-making, industrially it is synthesized by reacting ethylene with water vapor at elevated temperatures. a chemical engineer studying this reaction fills a flask at with of ethylene gas and of water vapor. he then raises the temperature considerably, and when the mixture has come to equilibrium determines that it contains of ethylene gas and of water vapor. the engineer then adds another of water, and allows the mixture to come to equilibrium again. calculate the pressure of ethanol after equilibrium is reached the second time. round your answer to significant digits?