Superheated steam is steam that has been heated to the temperature of vaporization

Question

BlackTom AI · Accepted Answer

Here is the true/false statement broken down and assessed step by step.
Option 1: True. The claim says superheated steam is steam heated to the temperature of vaporization. In reality, steam at the temperature of vaporization is saturated steam, not superheated. When water reaches its boiling point at a given pressure, it becomes saturated steam; heating it further to a higher temperature, while keeping the pressure constant, produces superheated steam. Therefore this option mischaracterizes superheated steam.
Option 2: False. This option correctly distinguishes between saturated steam (steam at the boiling point where liquid and vapor are in equilibrium) and superheated steam (steam that has been heated beyond the saturation temperature for the same pressure, with no liquid present). The phrase 'temperature of vaporization' corresponds to the boiling point for the given pressure, not to the definition of superheated steam, so describing superheated steam as having that temperature is inaccurate. Misunderstanding of phase change conditions often leads to the error in option 1.
In summary, the key distinction lies in saturation versus superheating: saturation temperature marks the onset of vapor formation at a given pressure, while superheating means continuing to heat the vapor above that saturation temperature, resulting in higher thermal energy and different properties.

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Superheated steam is steam that has been heated to the temperature of vaporization

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