A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: temperature (°C) 50.- 30.- 10.- -10.. -30.- - 50. heat added (kJ/mol) Use this graph to answer the following questions: What is the boiling point of X ? What phase (physical state) of X would you expect to find in the flask after 15 kJ/mol of heat has been added? °C (check all that apply) O solid O liquid Ogas X ? d. Ar
A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: temperature (°C) 50.- 30.- 10.- -10.. -30.- - 50. heat added (kJ/mol) Use this graph to answer the following questions: What is the boiling point of X ? What phase (physical state) of X would you expect to find in the flask after 15 kJ/mol of heat has been added? °C (check all that apply) O solid O liquid Ogas X ? d. Ar
Chemistry
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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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![A pure solid sample of Substance \( X \) is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results:
**Graph Explanation:**
- **Axes:**
- The y-axis represents the temperature in degrees Celsius (°C), ranging from -50°C to 50°C.
- The x-axis represents the heat added in kilojoules per mole (kJ/mol), ranging from 0 to 50 kJ/mol.
- **Graph Line:**
- Initially, the temperature is below 0°C and remains steady as heat is added.
- At around 5 kJ/mol, the temperature starts to rise rapidly, indicating the substance is reaching its melting point.
- The temperature levels off at approximately 0°C between 10 and 20 kJ/mol, indicating a phase change from solid to liquid.
- After this plateau, the temperature rises steadily again until it reaches another plateau at 40°C, indicating the boiling point and a phase change from liquid to gas.
**Questions:**
1. What is the boiling point of \( X \)?
- Answer is input as: ____ °C
2. What phase (physical state) of \( X \) would you expect to find in the flask after 15 kJ/mol of heat has been added?
- Options (check all that apply):
- [ ] solid
- [ ] liquid
- [ ] gas](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F12c0a0e9-4d98-45bb-8c42-bb6fd08d9097%2F89511331-5529-4d07-aff9-968bddb95313%2Fhyt3uje_processed.png&w=3840&q=75)
Transcribed Image Text:A pure solid sample of Substance \( X \) is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results:
**Graph Explanation:**
- **Axes:**
- The y-axis represents the temperature in degrees Celsius (°C), ranging from -50°C to 50°C.
- The x-axis represents the heat added in kilojoules per mole (kJ/mol), ranging from 0 to 50 kJ/mol.
- **Graph Line:**
- Initially, the temperature is below 0°C and remains steady as heat is added.
- At around 5 kJ/mol, the temperature starts to rise rapidly, indicating the substance is reaching its melting point.
- The temperature levels off at approximately 0°C between 10 and 20 kJ/mol, indicating a phase change from solid to liquid.
- After this plateau, the temperature rises steadily again until it reaches another plateau at 40°C, indicating the boiling point and a phase change from liquid to gas.
**Questions:**
1. What is the boiling point of \( X \)?
- Answer is input as: ____ °C
2. What phase (physical state) of \( X \) would you expect to find in the flask after 15 kJ/mol of heat has been added?
- Options (check all that apply):
- [ ] solid
- [ ] liquid
- [ ] gas
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