why steam burns more than boiled water at 100 degree c?

Answer 1

It doesn't. Burning is a result of heat exchange over a period of time. If you can decapitate the heat through your body's natural cooling system, then it won't burn. You can pass your hand slowly over the steam coming off a pot and you won't burn. But if you put your hand in the boiling water for the same length of time then your hand will be burned. That's because the water being much more dense than the steam will have greater contact with your hand and the heat transfer will be much much greater. More than your hand can handle. So it will burn.
The thing with steam is that, under pressure, it can build up a lot of heat. even up into the 200 to 250 degrees or more. At this temperature and pressure, it can rip your flesh off the bone on contact. Burning through conduction or convection is always based on rate of heat transfer over time .
Think of a sauna with100 degree steam around you. Your body is able to cool itself for a period of time. But just touching the water that's boiling will burn you.

Answer 2

provided that the steam and water are on a similar temperature then the only that has a greater robust warmth skill will reason a worse burn. i believe that water could have a greater robust warmth skill than steam. So the respond could be water.

Answer 3

because the steam has latent heat in it, which is absent in water at 100 degree C

Answer 4

It has to do with the fact that gases' (like steam) molecules are more spaced out than the other two states that matter can be in (liquids and solids).