Identifying phase transitions on a heating curve 05 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) heat added (k/mot) Use this graph to answer the following questions: C What is the melting point of X ? What phase (physical state) of X would you expect to find in the flask after 5 kJ/mol of heat has been added? (check all that apply) solid liquid gas