Question

why steam gives more heat as compare to hot water in same room temprature

Answer 1

Boiling water with specific heat of 4.2 KJ at a temperature of 100 deg Celsius requires an additional latent heat of 2264.76 KJ/kg in order to convert into steam.

Now coming to damage it would cause. When the steam condenses to water on the skin, steam and then water tends to come down to temperature of skin. Reciprocating the amounts of heat mentioned above a substantial difference in heat dissipated comes into picture which is the ultimate cause of burn and thus lesser burn injury by boiling water than steam.

Answer 2

steam gives more heat as compare to hot water in same room temperature because it has latent heat of vaporization.