1) The boiling point diagram for a mixture of benzene and toluene is shown below. Temperature (°C) 110 100 90 80 70 0 1 Mole fraction toluene Mole fraction benzene 0 a) What is the boiling point of pure toluene according to the boiling point diagram above? b) What is the initial boiling point of a solution that contains 70% toluene and 30% benzene? c) What is the approximate composition of the vapors when a solution of 70% toluene and 30% benzene is heated to its boiling point?

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### Boiling Point Diagram for Benzene and Toluene Mixture

The image shows a boiling point diagram for a mixture of benzene and toluene. The graph represents the relationship between temperature (in °C) and the mole fraction of toluene and benzene in the mixture.

#### Graph Explanation:

- **X-Axis (Horizontal):** 
  - Represents the mole fraction of toluene, ranging from 0 to 1.
  - The inverse scale represents the mole fraction of benzene (from 1 to 0).

- **Y-Axis (Vertical):**
  - Represents temperature in °C, ranging from 70°C to 110°C.

- **Curves:**
  - The lower curve represents the boiling point of the liquid mixture.
  - The upper curve represents the composition of the vapor in equilibrium with the liquid at a given temperature.

#### Questions:

a) **What is the boiling point of pure toluene according to the boiling point diagram above?**

b) **What is the initial boiling point of a solution that contains 70% toluene and 30% benzene?**

c) **What is the approximate composition of the vapors when a solution of 70% toluene and 30% benzene is heated to its boiling point?**
Transcribed Image Text:### Boiling Point Diagram for Benzene and Toluene Mixture The image shows a boiling point diagram for a mixture of benzene and toluene. The graph represents the relationship between temperature (in °C) and the mole fraction of toluene and benzene in the mixture. #### Graph Explanation: - **X-Axis (Horizontal):** - Represents the mole fraction of toluene, ranging from 0 to 1. - The inverse scale represents the mole fraction of benzene (from 1 to 0). - **Y-Axis (Vertical):** - Represents temperature in °C, ranging from 70°C to 110°C. - **Curves:** - The lower curve represents the boiling point of the liquid mixture. - The upper curve represents the composition of the vapor in equilibrium with the liquid at a given temperature. #### Questions: a) **What is the boiling point of pure toluene according to the boiling point diagram above?** b) **What is the initial boiling point of a solution that contains 70% toluene and 30% benzene?** c) **What is the approximate composition of the vapors when a solution of 70% toluene and 30% benzene is heated to its boiling point?**
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