Question

1.what is the physical state of matter at points 1,3 and 5 respectively.
2.what is representated by lines QR and ST in the graph?

Answer 1

l.1)at point 1 it is in solid state (Ice)
2)at point 2 it is in Liquid state (liquid water)
3) at point 5 it is in gaseous state ( water vapor)
ll. line QR represents the latent heat of fusion.
Whereas, the line ST represents the latent heat of vaporisation..
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Answer 2

Answer:

answer - 1-solid,2- liquid and 3- gas

Explanation:

as below 273k the water in solid form exist, at 273 to 373 k water exist in liquid form and above 373 k water exist in water vapour (gas) form