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Which statement is true about heating and cooling graphs? a. The angled parts of a heating...

Which statement is true about heating and cooling graphs?

a. The angled parts of a heating or cooling graph represent the change of state.

b. Temperature changes are represented on both heating and cooling graphs by the flat parts of the graph.

c. On the heating graph, thermal energy is being released by the water molecules throughout the heating process.

d. A heating graph shows a distinct melting point and boiling point.

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