Question

1)Describe IN POINT FORM what happens when you raise the pressure of a sample of water from 0.004 atm to 40 atm at a constant temperature of 100 degrees celcius.  

2)Describe IN POINT FORM what happens when you raise the temperature of a sample of water from -100 to +300 at a constant pressure of 40 atm.  

Answer 1

1)

• Water at 100 degrees celsius and 1atm pressure attains the boiling point.
• At the boiling point, the atmospheric pressure and the vapour pressure of water attain equilibrium.
• Atmospheric pressure is nothing but the applied pressure on the vessel containing water.
• In case of boiling of water, the water boils to form water vapours.
• At a constant temperature of 100 degrees celsius, if the pressure increases drastically to 40atm, the particles of water come closer.
• As the particles come closer volume of water decreases.
• Thus at immense high pressure of 40 atm water will solidify as the particles are tightly pressed to a constrained volume.
• From the phase diagram also it is clear that at 40 atm pressure and 100 degrees celsius water will exist as ice

2)

• Water at -100 is extremely frozen.
• water at 300 is in vapour form.
• so when the temperature rises from -100 to 300 the particles vibrate and move farther from each other increasing the volume.
• But at a huge pressure of 40 atm and a high temperature of 300 degrees celsius gaseous phase will exist.
• The situation explained can be correlated with the phase diagram.
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