After heating the substance with 0.9MPa steam
Thread Content
What is the temperature of the cooling water after heating a certain substance with 0.9MPa steam (at 180 degrees Celsius)? I hope everyone can provide a theoretical analysis approach.
The saturated temperature of 9 kilograms of steam is 175 degrees; heat with a superheat value is released from 180 to 175 degrees, and then the latent heat of vaporization of 2783 kJ/kg is released by the steam at 175 degrees, resulting in saturated water at 175 degrees. When the heat is sufficient, it results in saturated water at 175 degrees. If the temperature of the substance being heated continues to rise, the temperature of the saturated water decreases further. The main heat release is the latent heat of vaporization
The person on the 2nd floor has the same opinion as me; could there be other possibilities? For example, 0. Is there steam at 100 degrees Celsius at 9 MPa? I don’t think so
If the pressure remains unchanged after heating, still at 0.9 MPa for the condensed water, then the temperature also stays the same, at 175.358 degrees Celsius; only the latent heat of vaporization is released. If the pressure is reduced, the temperature is the saturation temperature at that pressure. This post was last edited by Qin Yu on 2009-4-1 17:42.]
For example, 0. Is there steam at 100 degrees Celsius at 9 MPa? It’s impossible to exist. 100 degrees Celsius corresponds to 1 atmosphere of pressure; the lowest temperature at which steam at 0.9 MPa can exist is its saturated temperature of 175.358 degrees Celsius. If someone asks you if there is water at 375 degrees Celsius, you can also say confidently that there isn’t. If someone asks you if there is steam at minus 4 degrees, you can answer confidently that yes, there is.
How is it possible to have steam at 100 degrees Celsius at 0.9 MPa???? What a childish question!!!!