Question

The diagram goes with the questions below

(for Problem 7-9) On the phase diagram shown above, segment corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium. 1) AB 2) AC 3) AD 4) CD 5) BC On the phase diagram shown above, the coordinates of point B corresponds to the 1) critical temperature and pressure 2) critical pressure 3) critical temperature 4) boiling point 5) triple point correspond to the triple On the phase diagram shown above, the coordinates of point point. 1) A 2) B 3) C 4) D C15) E

Answer 1

1) AC

At AC segment solid and gas forms of the substance are in equilibrium.

The substance exist as solid on the right hand side of the line CAD. The substance exist as gas on the right hand side of the line CAB. Substance exist as liquid in between DAB.

2) Point B is critical point of pressure and temperature.

This is the point at which liquid and gaseous phases coexist.

3) Point is the triple point.

This is the point at which all three phases of the substance coexist.