**11.22 Answer the following questions based on the P – T phase diagram of CO₂:

(a) CO₂ at 1 atm pressure and temperature – 60 °C is compressed isothermally. Does it go through a liquid phase ?

(b) What happens when CO₂at 4 atm pressure is cooled from room temperature at constant pressure ?

(c) Describe qualitatively the changes in a given mass of solid CO₂ at 10 atm pressure and temperature –65 °C as it is heated up to room temperature at constant pressure.

(d)** CO₂ is heated to a temperature 70 °C and compressed isothermally. What changes in its properties do you expect to observe?

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Payal Gupta | Contributor-Level 10

8 months ago

11.22

The fusion and boiling points are given by the intersection point where this parallel line cuts the fusion and vaporization curves. It departs from ideal gas behavior as pressure increases.

(a) At 1 atm pressure and at – 60 °C, it lies left of -56.6 $?$ (triple point O). Hence, it lies in the regi

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A glass full of hot milk is poured on the table. It begins to cool gradually. Which of the following is correct?

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(b) The temperature of milk falls off exponentially with time

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Payal Gupta

This is a multiple choice answer as classified in NCERT Exemplar

(b), (c), (d) When the hot milk in the table is transferred to the surroundings by conduction, convection and radiation.

According to newton's law of cooling temperature of the milk falls of exponentially. Heat also will be transferred

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