Lab Report 11

# Lab Report 11 - Temp (C) Height of air (cm) Volume (mm) 9.8...

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Date performed- 11/20/09 Marco Gutierrez Date Submitted- 12/3/09 Partner: Jess Baul Furong Sun The Properties Of Gas Objectives: To understand the how dependent the volume of a gas is on the temperature and pressure. Experimental Data: Part A: Temp (°C) Length of Air (cm) 9.8 4.75 25 4.91 35 5.25 50 5.79 65 6.31 75 6.65 95 6.98 Part B: atmospheric pressure = 710mmHg Syringe Volume (mL) Pressure (mmHg) 1 615.8 3 155.1 4 35.5 6 -164.8 7 -229.2 9 -320.1 10 -351.9 11 -380.2

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12 -406.8 13 -429.3 14 -448.4 15 -462.5 16 -477.6 17 -491.2 18 -502.4 19 -513.0 20 -522.2 Sample Calculations: V=πr²h V=π(2.5mm)²(475mm) V= 9326.6mm³ P(air)=P(sensor)+P(atm) P= 615.8mmHg+710mmHg P=1325.8mmHg PV V=K’/P (4.00mL)(25205mmHg)=100820mLxmmhg Standard deviation S- square root [(-2014.6)²+(-745.1)²+(-358.4)²+(- 69.2)²+(25.2)²+(168.7)²+(240.6)²+(298.4)²+(298)²+(308.7)²+(322)²+(372.1)²+(378)²+(396.4)²]/ 14
S= square root(5649311.08/14) S=635.23 mLxmmHg Results and Conclusions:

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Unformatted text preview: Temp (C) Height of air (cm) Volume (mm) 9.8 4.75 9326.6 25 4.91 9640.8 35 5.25 10308.4 50 5.79 11368.6 65 6.31 12389.7 75 6.65 13057.2 95 6.98 13705.2 Syringe Volume (mL) Pair (mmHg) PV (mLxmmHg) 1 1325.8 1325.8 3 865.1 2595.3 4 745.5 2982.0 6 545.2 3271.2 7 480.8 3365.6 9 389.9 3509.1 10 358.1 3581.0 11 330.8 3638.8 12 303.2 3638.4 13 280.7 3649.1 14 261.6 3662.4 15 247.5 3712.5 16 232.4 3718.4 17 218.8 3719.6 18 207.6 3736.8 Uncertainty: Our results were precise and I believe we could achieve the same results if we were conducting the experiment again. It was difficult to stir as well as heat the water at the same time. If the flame was to big, it would heat of the mercury even if the water was no at the right temperature. In part b, it was very difficult to hold the syringe steady at one point especially at the 15-20mL points....
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## Lab Report 11 - Temp (C) Height of air (cm) Volume (mm) 9.8...

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