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chemistry class 9 chapter 1​

Chemistry Class 9 Chapter 1 class=

Sagot :

tanmayakumarp3

Explanation:

i) Melting point = 15°C and Boiling point = 110°C

ii) The region C on graph there is only liquid state, the region A on graph there is only solid state.

iii) The straight line A1 - B1 shows that the melting point of solid wax and getting converted to liquid form.

iv) Latent heat of vaporization is a physical property of a substance.

It is defined as the heat required to change one mole of liquid at its boiling point under standard atmospheric pressure. 

v) At 'B' the wax is at both solid and liquid state

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