1) What is the melting point for iron? a) 500oC b) 1500oC c) 2800oC d) 3500oC 2) What phase is this substance in at 100oC? a) solid b) liquid c) gas d) not enough information provided 3) Where on this graph is potential energy changing? a) a, b b) c, d c) b, d d) a, c, e 4) Where on this graph is kintetic energy changing? a) a, b b) c, d c) b, d d) a, c, e 5) What phase(s) is/are present at 1500oC? a) solid b) liquid c) gas d) solid & liquid e) liquid & gas 6) What is the condensation point for this substance? Please note that while the x axis reads 'time', the assumption is that heat is added continually over time. a) -50oC b) -39oC c) 0oC d) 357oC 7) What is the freezing point for this substance? Please note that while the x axis reads 'time', the assumption is that heat is added continually over time. a) -50oC b) -39oC c) 0oC d) 357oC 8) At which of these temperatures is potential energy changing? a) -50oC b) -39oC c) 0oC d) 200oC 9) What phase(s) is/are present at -45oC?? a) solid b) liquid c) gas d) solid & liquid e) liquid & gas 10) What phase change is occurring at location B-C? a) melting or freezing b) vaporizing or condensing c) sublimating or depositing d) potential energy 11) What phase is the sample in at 80oC? a) solid b) liquid c) gas d) sublimation 12) What is the freezing point of this substance? a) -40oC b) -17oC c) 0oC d) 65oC

Reading a Heating Curve

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