1. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) At 300 o C what is the physical state of this compound? X Solid

2. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) What is the freezing point of this compound? 700 o C

3. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) What is the heat of fusion of this substance? 2000 – 500 = 1500 J / 10 g = 150 J/g

4. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) At 1100 o C what is the physical state of this compound? 1100 o C X liquid

5. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) What the boiling point of this compound? 1500 o C

6. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) What is the heat of vaporization of this substance? 8000 – 4000 = 4000 J / 10 g = 400 J/g

7. Temp ( o C) 1500 700 Phase Change Diagram Practice Use the following graph of Temperature vs. Heat for 10 g of compound “X” to answer the questions: 500 2000 4000 8000 Heat (J) At 1700 o C what is the physical state of this compound? 1700 o C X Gas