Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question

5. From the possible compounds listed in the Excel file, determine the Unknown Hydrocarbon.

 

### Unknown Hydrocarbon Experiment #### Compound A: - **Composition (% by mass):** 59.96% C, 26.62% O, 13.42% H - **Effusion Rate:** 1.478 times faster than Xenon gas #### Compound B: - **Composition (% by mass):** 62.04% C, 27.55% O, 10.41% H - **Effusion Rate:** 1.063 times faster than Xenon gas --- #### Table 1: Compound A Data for Clausius-Clapeyron Plot | Temp (°C) | Vap Press (torr) | 1/T (1/K) | Ln(VP) | |-----------|------------------|-----------|--------| | 10.0 | 15.4 | 0.003532 | 2.734 | | 20.0 | 29.6 | 0.003411 | 3.388 | | 30.0 | 54.5 | 0.003299 | 3.998 | | 40.0 | 96.3 | 0.003193 | 4.567 | | 50.0 | 164.5 | 0.003095 | 5.103 | | 60.0 | 271.9 | 0.003002 | 5.605 | **Summary of Clausius-Clapeyron Plot for Compound A:** - **Slope:** -5416 (1/K) - **Intercept:** 21.864 - **Enthalpy of Vaporization (kJ/mol):** 45.03 - **Normal Boiling Point (K):** 355.6 - **Normal Boiling Point (°C):** 82.5 --- #### Table 2: Compound B Data for Clausius-Clapeyron Plot | Temp (°C) | Vap Press (torr) | 1/T (1/K) | Ln(VP) | |-----------|------------------|-----------|--------| | 100.0 | 6.0 | 0.002680 | 1.792 | | 120.0 | 18.3 |
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Transcribed Image Text:### Unknown Hydrocarbon Experiment #### Compound A: - **Composition (% by mass):** 59.96% C, 26.62% O, 13.42% H - **Effusion Rate:** 1.478 times faster than Xenon gas #### Compound B: - **Composition (% by mass):** 62.04% C, 27.55% O, 10.41% H - **Effusion Rate:** 1.063 times faster than Xenon gas --- #### Table 1: Compound A Data for Clausius-Clapeyron Plot | Temp (°C) | Vap Press (torr) | 1/T (1/K) | Ln(VP) | |-----------|------------------|-----------|--------| | 10.0 | 15.4 | 0.003532 | 2.734 | | 20.0 | 29.6 | 0.003411 | 3.388 | | 30.0 | 54.5 | 0.003299 | 3.998 | | 40.0 | 96.3 | 0.003193 | 4.567 | | 50.0 | 164.5 | 0.003095 | 5.103 | | 60.0 | 271.9 | 0.003002 | 5.605 | **Summary of Clausius-Clapeyron Plot for Compound A:** - **Slope:** -5416 (1/K) - **Intercept:** 21.864 - **Enthalpy of Vaporization (kJ/mol):** 45.03 - **Normal Boiling Point (K):** 355.6 - **Normal Boiling Point (°C):** 82.5 --- #### Table 2: Compound B Data for Clausius-Clapeyron Plot | Temp (°C) | Vap Press (torr) | 1/T (1/K) | Ln(VP) | |-----------|------------------|-----------|--------| | 100.0 | 6.0 | 0.002680 | 1.792 | | 120.0 | 18.3 |
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Step 1: Graham's law of effusion
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Step 2: Determination of molar mass of A
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Step 3: Finding the compound A
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Step 4: Determination of molar mass of B
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Step 5: Finding the compound B
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