Why does it take time to change water at 100 C to steam at 100 C compared to having the same mass of water from 0 C to 100 C?

if steam and water are both at 100 degrees celsius, why would the steam scald you more, even if they both have the same kinetic energy?

Do you mean steam as in evaporized water?

I think thats what you were asking.

Oh ya, I'm pretty sure, the more kinetic energy the more heat it emits. (Kinetic Energy of molecule i.e H20, having more motion, therefore more kinectic energy)

if steam and water are both at 100 degrees celsius, why would the steam scald you more, even if they both have the same kinetic energy?

Because I don' think it's possible to have water and water vapor at the same temperature.

Steam has more energy than water because it takes energy to break the bonds that keep it a liquid. When steam hits you, some of it condenses, and your skin absorbs all that extra energy.

is it called superheated?

No. It's superheated once there is no longer a dryness fraction (ie once all the liquid water in the mixture has evaporated, or when the steam is 'dry'.). This is the region beyond the saturation line on a Ts diagram of water boiling.

Once water reached it's evaporation point, it changes into steam, and floats away into the air. This small amount of water reduces the overall temperature of water to 212 degrees F. This means no matter what water's temperature will not exceed 212 degrees F. For example, if you put a cup of water in an oven at 400 degrees F, the water would be 212 degrees F. Why? Because as, water heats to it's evaporation point, (212) it turns to steam. Steam is less dense than air, so it rises away from the cup. This reduces the overall temperature of the water, making it stay at a temperature of 212 degrees F or 100 C.

This means no matter what water's temperature will not exceed 212 degrees F.

This is misleading at best:

Once water reached it's evaporation point, it changes into steam, and floats away into the air.

if steam and water are both at 100 degrees celsius, why would the steam scald you more, even if they both have the same kinetic energy?

the owen is a constant heating device, water upon constant heating beyond the Tsat will yield to super-heated tendencies, meaning the cup becomes empty & the owen is filled with steam at super-heated temperatures and the pressure rises. The Latent heat of vapourization is surpassed by constant heating easily..

Nov21-04, 03:12 PM <---Whew! Long time ago that this thread was brought up for air!!

Indeed. And it seems gibberish to me.

What's an owen?

sorry. its oven, my bad..

Ok, but I still don't get how your post is shedding any light on the topic.

I guess it doesn't matter; the thread's 7 years old.

just a random browse n got into it..didnt get to see when were these published in the forum..