Superheated steam is characterized by which of the following?

Superheated steam is a state of steam that has been heated beyond its saturation point, which means that it exists at a temperature higher than both wet steam (which contains water droplets) and saturated steam (which is at the boiling point for the given pressure). When steam is superheated, it has gained additional energy without any increase in pressure, allowing it to achieve a higher temperature.

This characteristic is important in various applications, such as in turbines and heat exchangers, where the efficiency and energy quality can be significantly improved by using superheated steam. The higher temperature translates to greater energy content and helps to prevent condensation within steam lines, which can cause erosion or water hammer in the system.

In contrast, saturated steam, which is at the boiling point, contains water droplets that can affect system performance. Thus, while superheated steam does indeed have a higher temperature than saturated steam, it is not necessarily always at a higher pressure, depending on the system's design and the specific conditions.

The other options do not fully encapsulate the unique properties of superheated steam. Therefore, the correct and most defining characteristic of superheated steam is that it has a higher temperature than both wet and saturated steam, making this answer the most accurate.