States of Matter Identifying phase transitions on a heating curve 3/5 E 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: 190. 170. 150. temperature (°C) 130. 110. 90.1 70. 20. 30. 40. 50. heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X? ] °C What phase (physical state) of X would you expect to find in the flask after 25 kJ/mol of heat has been added? (check all that apply) solid liquid gas G

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States of Matter
Identifying phase transitions on a heating curve
3/5
E
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:
190.
170.
150.
temperature (°C) 130.
110.
90.1
70.
20.
30.
40.
50.
heat added (kJ/mol)
Use this graph to answer the following questions:
What is the melting point of X?
] °C
What phase (physical state) of X would
you expect to find in the flask after
25 kJ/mol of heat has been added?
(check all that apply)
solid
liquid
gas
G
Transcribed Image Text:States of Matter Identifying phase transitions on a heating curve 3/5 E 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: 190. 170. 150. temperature (°C) 130. 110. 90.1 70. 20. 30. 40. 50. heat added (kJ/mol) Use this graph to answer the following questions: What is the melting point of X? ] °C What phase (physical state) of X would you expect to find in the flask after 25 kJ/mol of heat has been added? (check all that apply) solid liquid gas G
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