Evaluation of a Gas Constant (Experiment 3) Essay Example for Free

Evaluation of a Gas Constant (Experiment 3) EssayExperiment 3 Evaluation of Gas Constant proposeThe purpose of this lab is to demonstrate the archetype gas law under ordinary conditions. In this lab, the variables in the ideal gas law are know or can be found aside from the constant R. Thus, the R value can be found and relatively determine the relevancy of the ideal gas law to the lab conditions. The ideal gas law was tested using the reactionMg (s) + 2HCl2 (aq) H2 (g)Procedure1. Ribbons of milligram (5) were cut to the approximate continuance of the instructors example and were weighed separately on scale 1. 2. HCl provided by the instructor was added to a eudiometer vacuum tube (8mL). The rest of the tube was filled with water. One of the magnesium tapes was wrapped around a piece of copper wire in the opening of the tube. 3. The eudiometer tube was then inverted over and into a 450 mL beaker with water. The sign volume was recorded. 4. While the reaction occurred, the t emperature was taken at 1 minute intervals for 3 minutes. 5. After the reaction occurred, the height difference from the solution within the eudiometer tube and the top of the liquid volume in the beaker was recorded. The final volume was also recorded.Summary TableMean of R= .0737 beat Deviation= .0298Relative Standard Deviation= 40.46%Summary TableMean of R= .0737Standard Deviation= .0298Relative Standard Deviation= 40.46%DiscussionThis lab was supposed to generate number close to the R constant by plugging in the values acquired in reaction Magnesium and Hydrochloric acid reaction. (The reaction results in H2 gas.) The mean acquired from our data chasten was .0737 L-ATM/mol-K as opposed to the actual constant .08206 L-ATM/mol-K. The constant we acquired was much lower in value, potentially due to the outlier in our data set streak Four. Trial Four resulted in the R value .0205 ATM-L/K-mol which skewed our relative mean, standard deviation and relative standard deviation. By re moving the fourth trial from the data set, the bare-assed mean is .08705 L-ATM/mol-K, a closer but slightly higher R value. The standard deviation would be .00236 and the relative standard deviation would be 2.71%. These values have more precision than the 40.46% relative standard deviation and .0298 standard deviation acquired in the entire data set. I believe there mustiness have been an error in the methodology to produce the outlier result in the fourth trial. Too much liquid could have been spilled during the process or perchance the magnesium did not fully react because it was so tightly bound around the copper. The error in this lab could range from those listed above and inaccurate measurements.