Question

Is there a value for the enthalpy of vaporization of water at any temperature? Or does the value change with different temperatures? And if there is just one value, do you know what it is?

Answer 1

No, the enthalpy changes with temperature. At the boiling point of water, the heat of vaporization is 540 calories/gram or 2260 Joules/g. At body temperature (about 37 degrees C), the heat of vaporization is 2410 J/g. I don't know it at other temperatures but the net probably will have it if you try google.

Answer 2

Thanks for the help. Sorry for the triple post. You might want to change having the site say press ctrl+d to save the page to check your answer as I did that and it lead me back to the posting page every time.