Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Use the graph below to solve for the following questions. The graph show a mixtures of methanol and benzene.
a. What phases are present in regions 1, 2, and 3?
b. Describe how you would find the boiling point of a mixture that was 20% methanol, 80% benzene
c. Identify the boiling point and composition of the azeotropic mixture. Explain the meaning of the azeotropic point of this phase diagram.
Transcribed Image Text:The image depicts a graph illustrating the relationship between temperature \( T(K) \) and the mole fraction of methanol. The x-axis represents the mole fraction of methanol, ranging from 0 to 1, while the y-axis represents temperature in Kelvin, ranging from 342 K to 354 K.
There are three curves labeled 1, 2, and 3 on the graph:
1. **Curve 1 (Lightest Curve):**
- This curve shows a pronounced V-shape, with the lowest point at approximately 0.5 mole fraction of methanol.
- The temperature decreases from around 353 K at 0 mole fraction to 342 K at the center and increases back to 353 K at 1 mole fraction.
2. **Curve 2 (Medium Curve):**
- This curve also exhibits a V-shape but is less steep than Curve 1.
- It starts from about 353 K, drops to a minimum around 344 K, and rises again to 353 K.
3. **Curve 3 (Darkest Curve):**
- The steepest of all, Curve 3 closely follows the y-axis at either end.
- It starts and ends at approximately 353 K with a sharp drop to around 346 K at 0.5 mole fraction.
This graph can be used to analyze how the temperature varies with changes in methanol concentration in a mixture.
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