4. The heat of vaporization of a liquid may be obtained from the approximated integrated form of the Clausius-Clappeyron equation In (P2/P) T,T2 P2 AH, = -R- = R -In- 1/T, - 1/T, T2 - T,P For water, the vapor pressure is measured to be 9.2 Torr at 10.0°C (283.15K) and 55.3 Torr at 40.0°C (313.15K). Taking R to be 8.3145 JK' mol', calculate AHvap. Taking the limit of error (95% confidence) in the temperature measurement to be 0.1K and that in the pressure measurements to be 0.1 Torr, calculate the uncertainty in AHvap. A literature source gives 43,893 J/mol for AHvap at 25°C. Is the difference between this value and your value significant at the 95% confidence level?

4. The heat of vaporization of a liquid may be obtained from the approximated integrated form of the Clausius-Clappeyron equation In (P2/P) T,T2 P2 AH, = -R- = R -In- 1/T, - 1/T, T2 - T,P For water, the vapor pressure is measured to be 9.2 Torr at 10.0°C (283.15K) and 55.3 Torr at 40.0°C (313.15K). Taking R to be 8.3145 JK' mol', calculate AHvap. Taking the limit of error (95% confidence) in the temperature measurement to be 0.1K and that in the pressure measurements to be 0.1 Torr, calculate the uncertainty in AHvap. A literature source gives 43,893 J/mol for AHvap at 25°C. Is the difference between this value and your value significant at the 95% confidence level?

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter6: Equilibria In Single-component Systems

Section: Chapter Questions

Problem 6.25E: 6.25. Phosphorus exists as several allotropes that have varying properties. The enthalpy of...

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