Particles are closest together at the point A, when the substance is in solid state.
What is heating graph curve?
A heating curve is a plot of graph in which a substance is exposed to increasing temperatures over time to determine how much energy it absorbs and how its state changes as the temperature rises.
- In the point A heating of solid takes place.
- In point B melting of solid into liquid takes place.
- In point C heating of liquid takes place.
- In point D boiling of of liquid takes place to cocert into gases.
- In point E heating of gas takes place.
- Point F is the melting point of solid.
- Point G is the boiling point of liquid.
At the point A, particles are closest to each other as they are present in solid state.
Hence in the given graph respective points are heating of solid, melting of solid, heating of liquid, boiling of liquid, heating of gas, melting point and boiling point.
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