As steam pressure in a boiler increases, what also increases alongside steam and water?

When steam pressure in a boiler increases, the temperature of the steam also increases. This relationship is based on the principles of thermodynamics, specifically the properties of water and steam as described by the saturation temperature and pressure curves.

As steam pressure rises, the temperature must also rise to maintain the balance according to the steam tables. For instance, at a higher pressure, the boiling point of water becomes elevated, which in turn means that the temperature of the steam produced is higher. This phenomenon is critical in steam applications, as the temperature affects both the efficiency and safety of various operations in the system.

The other options, while related to the steam generation process, do not directly correlate with the increase in steam pressure in the same manner. For example, the volume of steam produced can vary but does not inherently increase just because pressure rises; it depends on the specific heat input and other factors. Similarly, the concentration of dissolved solids could change as water concentration shifts but is not a direct outcome of increased pressure. Operating efficiency can be influenced by pressure and temperature changes, but it is a more complex relationship and not a direct consequence of the initial condition stated in the question.