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# Aim a) To verify that the pressure of a gas varies linearly with its temperature (expressed in degrees Celsius) when the volume of the gas is kept constant. b) To make an estimate in degree Celsius of absolute zero.

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Introduction

Transfer-Encoding: chunked ﻿Pressure Law and Absolute Zero Aim a) To verify that the pressure of a gas varies linearly with its temperature (expressed in degrees Celsius) when the volume of the gas is kept constant. b) To make an estimate in degree Celsius of absolute zero (i.e. zero Kelvin) Background Knowledge Pressure is the amount of force acting per unit area[1].It is exerted by particles collisions inside a closed container. Temperature is an objective measure of cold or hot. When a gas is heated, the particles moving speed increase due to the increase kinetic energy.It means the particles hit the side of the container more frequently and create a greater force on it. ...read more.

Middle

2.Ice was put into the beaker to cooling the water,Stir the water and ice. 3.Pressure and Temperature was record. 4.The water was slowly heat up by Bunsen burner,the temperature of water and air was rise. 5.Record the pressure and temperature as it increased 5 degree until the water reach boiling point. Data Collection Pressure x105 (Pa)0.01 Temperature (°C)0.5 0.78 6.0 0.80 11.0 0.81 16.0 0.81 21.0 0.84 26.0 0.86 31.0 0.88 36.0 0.89 41.0 0.90 46.0 0.92 51.0 0.93 56.0 0.95 61.0 0.96 66.0 0.98 71.0 1.00 76.0 1.01 81.0 1.02 86.0 1.04 91.0 1.05 96.0 1.06 100.0 Data Process and Analysis Figure 1. Pressure vs Temperature y=0.003x+0.7625 (Error bar is in black line and too small to see) ...read more.

Conclusion

As the gas did not reach the same temperature as the beaker, the pressure we recorded is smaller than the real value. We can improve this by put the digital thermometer into the bulb and read the temperature directly.This will increasing the temperature reading of this experiment. There is also random error in this experiment. We only did one trail due to the time limitation.We could reduce the random errors by doing multiple measurements, at least 5 trail. I could also consider wider range of temperature which can make our results more accurate Reference * Lab experience n.5 Gay-Lussac?s Law, Jueves, 12th Feb 2013 http://thelabexperience.blogspot.de/2013/02/lab-experience-5.html * Gay Lussac?s Law, Aree Salah, 12th Nov 2013 http://thelabexperience.blogspot.de/2013/02/lab-experience-5.html * Random vs Systematic Errors, R.H.B.Exel lhttp://www.physics.umd.edu/courses/Phys276/Hill/Information/Notes/ErrorAnalysis.html ________________ [1] Pressure https://en.wikipedia.org/wiki/Pressure ...read more.

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