ne boiling point of diethyl ether CH3CH20CH2CH3 1s 34.50°C at 1 atmosphere. A nonvolatıle, nonelectrolyte that dıssolves in diethyl ether is estrogen (estradiol). ow many grams of estrogen, C13H2402 (272.4 g/mol), must be dissolved in 250.0 grams of diethyl ether to raise the boiling point by 0.450 °C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula KL (°C/m) KfC/m)| Water H20 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHC13 3.67 Benzene 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 g estrogen.
ne boiling point of diethyl ether CH3CH20CH2CH3 1s 34.50°C at 1 atmosphere. A nonvolatıle, nonelectrolyte that dıssolves in diethyl ether is estrogen (estradiol). ow many grams of estrogen, C13H2402 (272.4 g/mol), must be dissolved in 250.0 grams of diethyl ether to raise the boiling point by 0.450 °C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula KL (°C/m) KfC/m)| Water H20 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHC13 3.67 Benzene 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 g estrogen.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
100%
Boiling Point Elevation/Freezing Point Depression
T = m K
Where:
Kb and Kf depend only on the SOLVENT. Below are some common values. Use these values for the calculations that follow.
T = m K
Where:
| T | = T(solution) - T(pure solvent) * |
| m | = (# moles solute / Kg solvent) |
| Kb | = boiling point elevation constant. |
| Kf | = freezing point depression constant. |
Kb and Kf depend only on the SOLVENT. Below are some common values. Use these values for the calculations that follow.
| Solvent | Formula | Kb (°C / m) | Kf (°C / m) |
|---|---|---|---|
| Water | H2O | 0.512 | -1.86 |
| Ethanol | CH3CH2OH | 1.22 | -1.99 |
| Chloroform | CHCl3 | 3.67 | |
| Benzene | C6H6 | 2.53 | -5.12 |
| Diethyl ether | CH3CH2OCH2CH3 | 2.02 |
*Please note that ΔT as defined above will be a negative number for freezing point depression. Therefore, Kf must also be given as a negative number.
Transcribed Image Text:The boiling point of diethyl ether CH3CH2OCH2CH3 is 34.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is estrogen (estradiol).
How many grams of estrogen, C18H2402 (272.4 g/mol), must be dissolved in 250.0 grams of diethyl ether to raise the boiling point by 0.450 °C ? Refer to the table for the necessary boiling or freezing point constant.
Solvent
Formula
Kb (°C/m) Kf (°C/m)
Water
H20
0.512
1.86
Ethanol
CH3CH2OH
1.22
1.99
Chloroform
CHC13
3.67
Benzene
CGH6
2.53
5.12
Diethyl ether CH3CH2OCH2CH3
2.02
g estrogen.
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