The answer is C can you explain how to use the charts to fin

The answer is C can you explain how to use the charts to find this.

Using the property tables in the appendix the phase description in the table cell labeled (iii) is: saturated vapor saturated liquid compressed/subcooled liquid superheated vapor saturated mixture

Solution

As pressure increases boiling point of water increases at standard atmospheric pressure of 101.3 KPa the boiling point temperature is 100^oC. Now if pressure is increased to 500 KPa the boiling point goes above 100^oC and hence at 75^oC the water is compressed liquid or saturated liquid.

From steam tables go to the pressure corresponding to 500 KPa and find the saturation temperature you will find the saturation temperature or boiling point temperature to be 151.84^oC and at this condition given temperature is 75^oC so the liquid is subcooled.