Curt kim, jonathan lee, keshav mantha & bobbie sheng. Goal: to measure the physical properties of pressure, volume, and temperature for gaseous substances and to determine the molar mass (molecular weight) of a volatile liquid through the ideal gas law, the non-ideal gas law, and experimental data. Procedure: to begin, an erlenmeyer flask was massed along with an attached clamp, rubber band, and piece of aluminum foil. Next, 5 milliliters of acetone was measured and poured into the flask, and the flask was sealed with aluminum foil. The foil was perforated with four small holes in order to allow the acetone vapors to escape when heated. A beaker of water was then heated on a hot plate; once it began to boil, the flask was clamped and lowered into the boiling water bath. While the flask was in the boiling water bath, temperature was being monitored.