Steam burns are more serious in comparison to those caused from boiling water because

Question

Steam burns are more serious in comparison to those caused from boiling water because (A) steam at 100° C carries same heat as that of water at 100° C (B) steam is more reactive (C) steam has less surface tension, so it burns surface more rapidly (D) steam at 100° C carries more heat than water at 100° C

Tardigrade Admin · Accepted Answer

For water, the latent heat of fusion and vaporisation are

L_{F} = 3.33 \times 1 0^{5} J k g^{- 1}

and

L_{V} = 22.6 \times 1 0^{5} J k g^{- 1}

, respectively,
i.e.

3.33 \times 1 0^{5} J

of heat is needed to melt

1 k g

of ice at

0^{\circ} C

and

22.6 \times 1 0^{5} J

of heat is needed to convert

1 k g

of water to steam at

10 0^{\circ} C

.
So, steam at

10 0^{\circ} C

carries

22.6 \times 1 0^{5} J k g^{- 1}

more heat than water at

10 0^{\circ} C

.
This is why burns from steam are usually more serious than those from boiling water.

Q. Steam burns are more serious in comparison to those caused from boiling water because

steam at $10 0^{\circ} C$ carries same heat as that of water at $10 0^{\circ} C$

steam is more reactive

steam has less surface tension, so it burns surface more rapidly

steam at $10 0^{\circ} C$ carries more heat than water at $10 0^{\circ} C$

Q. Steam burns are more serious in comparison to those caused from boiling water because

steam at 100∘C carries same heat as that of water at 100∘C

steam is more reactive

steam has less surface tension, so it burns surface more rapidly

steam at 100∘C carries more heat than water at 100∘C

steam at $10 0^{\circ} C$ carries same heat as that of water at $10 0^{\circ} C$

steam at $10 0^{\circ} C$ carries more heat than water at $10 0^{\circ} C$