Question

The total pressure of a pressure cooker filled with water increases to when it is heated, and this pressure is maintained by the periodic operation of a relief value. Use Figure 10.24c to estimate the temperature of the water in the pressure cooker.

Short answer

The water temperature is 420 K

Step-by-step solution

Concept of phase diagram

A phase diagram is a graphical representation of the various phases of a substance or mixture of substances that coexist in thermodynamic equilibrium, and undergo phase changes under different working conditions, such as temperature, pressure, or volume.

Concept of phase of water and temperature estimation

The water system is divided into three phases: Ice (S), water (L), and water vapour (G).

${\text{H}}_2\text{O}$is the only chemical compound present, as a result, it is a one-component system.

From Figure 10.24c, the boiling point of water at a pressure at 4 atm is 420 K. At 420 K a line differentiates between liquid and vapour phase.