Answer the following questions based on the P-T phase diagram of `CO_2`
Describe qualitatively the changes in a given mass of solid `CO_2` at 10 atm pressure and temperature `-65^@C` as it is heated upto room temperature at constant pressure.

Answer the following questions based on the P-T phase diagram of CO_2 What happens when CO_2 at 4 atm pressure is cooled from room temperature at constnat pressure?

Answer the following questions based on the P-T phase diagram of carbon dioxide: What are the critical temperature and pressure for CO_@ ? What is their significance?

Answer the following questions based on the P-T phase diagram of CO_2 CO_2 at 1 atm pressure and temperature 60^@C is compressed isothermally. Does it go through a liquid phase?

Answer the following questions based on the P-T phase diagram of carbon dioxide: What is the efect of decrease of pressure on the fusion and boiling point of CO_2 ?

Answer the following questions based on the P-T phase diagram of carbon dioxide: At what temperature and pressure can the solid, liquid and vapour phases of CO_2 co-exist in equilibrium?

Which one of the following relationships when graphed does not give a straight line for helium gas? I. K.E. and T at constant pressure and volume II. P v/s V at constant temperature for a constant mass III. V v/s 1/T at constant pressure for a constant mass

Lowering in vapour pressure is determined by Ostwald and Walker dynamic methed. It is based on the prinicipal , that when air is allowed to pass through a solvent or solution, it takes up solventvapour with it to get itself saturated at that temperature I and II are weighted separately before and after passing dry air. Loss in mass of each set, gives the lowing of vapour pressure. The temperature of air, the solution and the solvent is kept constant. Dry air was passed thorough 9.24 g of solute in 108 g of water and then through pure water. The loss in mass of solution was 3.2 g and that of pure water 0.08 g . The molecular mass (g/mol) of solute is nearly :

One mole of an ideal gas (C_(v,m)=(5)/(2)R) at 300 K and 5 atm is expanded adiabatically to a final pressure of 2 atm against a constant pressure of 2 atm. Final temperature of the gas is :