T1T2 lab report

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University at Buffalo *

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151

Subject

Chemistry

Date

Jan 9, 2024

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docx

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4

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T1 VI-I M Cu = 161.8 g M C = 25.2 g M w + M C = 73.6 g M w = 72.6 g – 25.2 g = 47.4 g VI-II t(min) t(s) T( o C) 1:00 60 25.5 2:00 120 25.3 3:00 180 25.1 4:00 240 25 5:00 300 24.9 t(min) t(s) T( o C) 5:00 300 20.6 5:30 330 20.6 6:00 360 20.7 6:30 390 20.7 7:00 420 20.7 7:30 450 20.8 8:00 480 20.8 8:30 510 20.8 9:00 540 20.8 9:30 570 20.9 10:00 600 20.9
3:36 4:48 6:00 7:12 8:24 9:36 10:48 20.45 20.5 20.55 20.6 20.65 20.7 20.75 20.8 20.85 20.9 20.95 Temp vs Time Linear (Temp vs Time ) Temp vs Time Linear (Temp vs Time) Time (min) Temp (C) T I = 25.5 o C T f = 20.9 o C Calculations of specific heat C M M Cu (T f – 0 o C) = 1 M w (T i – T f ) + 0.22 M c (T i – T f ) C M (161.8 g)( 20.9 o C – 0 o C) = 1(47.4 g)(25.5 o C - 20.9 o C) + 0.22 (25.2 g) (25.5 o C - 20.9 o C) C M = 243.54/3381.62 = 0.0720 J/mol The accepted value for the specific heat of copper is 0.385 J/g. This value was found through data collected by CUNY Kingsborough Community College. The following equation was used to determine the percent error: |Accepted – Experimental/Accepted|x 100 |0.385 – 0.0720/0.385| x 100 = 81.30 % error
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