how much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius?

i know that normally when the temperatures are the same, the heat added is zero, but i think that in this case i need to do something different.

To determine the amount of heat required to convert 1.0 kg of water at 100 degrees Celsius to steam at the same temperature, you need to consider the process of phase change. During this process, heat is added to change the phase of a substance without changing its temperature.

To calculate the heat required, you can use the concept of latent heat of vaporization, which is the amount of heat needed to convert a substance from a liquid to a gas at a constant temperature. For water, the latent heat of vaporization is approximately 2260 kilojoules per kilogram (kJ/kg).

So, in this case, the amount of heat required to convert the water to steam at 100 degrees Celsius would be:

Heat = Mass of water * Latent heat of vaporization

Heat = 1.0 kg * 2260 kJ/kg = 2260 kJ

Therefore, you would need to add approximately 2260 kilojoules of heat to convert 1.0 kg of water at 100 degrees Celsius to steam at 100 degrees Celsius.

You need...

heattochangestate=mass*Heatvaporization