Heating a Pure Substance such as Water

Why does T

become

constant

during

melting and

evaporating?

How is energy

used for these

processes?

2.02 J/goC; 36.39 J/mol oC

6009.5 J/mol

40,700 J/mol

4.184 J/goC; 75.37 J/mol oC

2.02 J/goC; 36.39 J/mol oC

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