Pressure – Temperature Relationship in Gases Lab PDF

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Pressure – Temperature Relationship in Gases Lab...

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Shannon Urmetz 2702902 Chem 266 section 01 Pressure – Temperature Relationship in Gases Lab Introduction In this lab, we observed the relationship between pressure and temperature. We found a strong positive linear relationship between these two variables. This was determined by measuring the pressure of gas at range of varying temperatures including (in degrees Celsius) 7, 20, 54.8, and 89.8. Through this we were able to conclude that pressure and temperature are directly proportional to each other. This lab shows great insight into Gay Lussac’s Law which states that “if the pressure is held constant, the volume V is equal to a constant times the temperature T” ( NASA, n.d) Procedure  Obtain and wear goggles  Prepare a hot water bath, put about 400 mL of hot tap water into a 600 mL beaker and place it on the hotplate  Prepare the ice water bath  Prepare a temperature probe, and gas pressure sensor  Inspect tubing for melted sections  Start Data collections: pressure versus temp o Please flask in ice bath,make sure entire flask is covered o Place in temperature probe o When both readings stabilize keep to store and record in your data table  Dump ice bath and refill beaker with cold tapwater  Use temperature probe to measure/Monitor the temperature of the hot water bath  use speaker tongs to carefully remove speaker from hot plate when the temperature is between 50 and 60°C  when both reading stabilize record Data in your table  Resume heating to 80 To 90°C one both readings stabilize Record data in your table  Examined data points along displayed graph of pressure versus temperature in degrees Celsius  Set two absolute value scale following directions  Follow procedure to calculate regression statistics and to plot a best fit regression line on the graph Results Pressure (kPA) 97.60 101.98 114.15 124.80

Temp (C) 7 20 54.8 89.8

Temp (K) 280 293 327.8 363.8

Constant ( p/t) .349 .348 .349 .343

Discussion In this lab we saw Various errors could have influenced the data collected in this experiment. One being that the temperature was changing throughout the collection data. Another being that visual judgements of data can be highly inaccurate compared to other methods of data collection. Conclusion Within this experiment we saw a strong positive linear association between the two variables pressure and temperature. In simpler terms, as temperature increases so will the pressure. For our data, this directly proportional relationship can be modeled using the following calculated regression equation (pressure in kPa) = 0.3265X + 6.395 (temp in Kelvin). Overall this experiment was a success, and I gained insight into the relationship between pressure and temperature.

References (n.d.). Retrieved November 13, 2017, from https://www.grc.nasa.gov/www/k12/airplane/glussac.html...