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Phase Diagrams and Physical Transformations (2) 3. The following data apply to the triple point of water H2O : (total 10 points) - Temperature 0.01C - Pressure 4.6mmHg - Specific volume of solid 1.12cm3/g - Specific volume of liquid 1.00cm3/g - Heat of melting 80cal/g - Heat of vaporization 600cal/g a) Sketch a P-T diagram for H2O which does not need to be to scale but should be qualitatively correct. Label the various phases and critical points. (5 points) b) The pressure inside a container enclosing H2O (which is maintained at T=1.0C ) is slowly reduced from an initial value of 105mmHg. Describe what happens and calculate the pressure at which the phase changes occur. Assume the vapor phase behaves like an ideal gas (5 points)