Gas Laws Lab Report

Gas Laws Lab Report

CHM 131 – 500A

*Scott Futrell

Brittany McBill

Ellen Beattie

This laboratory experiment focuses on The Gas Laws of Robert Boyle and Gay-Lussac. Boyle’s Law defines the relationship that occurs between the pressure and volume of a confined gas. Gay-Lussac's law explains the relationship that occurs between the temperature of a gas and the pressure. The first experiment monitors the pressure of a gas while the volume changes. The second experiment monitors the pressure while the temperature goes rises. Boyles Law was generally supported with some flaws from human error, while Gay-Lussac Law was supported with accurate data. This lab did support the concepts of the Gas Laws.

Introduction

This laboratory experiment focuses

Then we positioned the front edge of the black ring inside the syringe to the 10.0 mL mark, then connected the syringe to the valve of the Gas Pressure Sensor. The LabQuest device was then set to record the data. To account for the extra volume in the system, you will need to add 0.8 mL to your syringe readings (Holmquist, Randall, and Volz 2). We moved the black ring of the piston to the 5 mL line on the syringe and held it there. Once the pressure value steadied on the LabQuest screen, we recorded the results. We kept and stored our reading in LabQuest. We continued collecting data at the syringe volumes of 10.0, 12.5, 15.0, 17.5, and 20.0 mL

With the LabQuest device in hand, we then attached the Gas Pressure Sensor to channel 1, and the Temperature Probe to channel 2. The group then retrieved the rubber stopper assembly and attached the end of the tubing to the open stem of the Gas Pressure Sensor while leaving the valve stem in the open position. To hold the flask down in the water bath, we placed the glass stir rod into the opening of the rubber-stopper assembly and then insert the assemble into the neck of the 125 mL Erlenmeyer flask with a twist to make sure of a snug fit. We then closed the 2-way valve. Using the thermometer holder, we attached the glass stir rod at the base next to the rubber stopper, and placed the flask into the ice bath. Our group then fastened the thermometer to the ring stand. After procuring the 3-prong clamp we used it to hold the temperature probe away from all sides of the glass while keeping the probe submerged several inches deep. The group then placed the flask and assembly onto a hot-plate and recorded temperature and pressure data. We then turned the hot plate on and start recording data at 15 degree intervals until boiling occurred.

Results

The data from the first experiment demonstrated that when the temperature is held at a constant and the pressure increases, then the volume will decrease. The data collected from the experiment are shown in figure1.

Fig.