Question

Give reasons :
a) Steam produces more severe burns than boiling water.
b) We are able to sip hot tea faster from a saucer rather than a cup.
c) Doctors advice to put strips of wet cloth on the forehead of a person having high
temperature.

Answer 1

Answer:

hello,

Explanation:

a) there is latent heat of vaporisation in it

b) because more the surface area is more the evaporation occurs

c)When strips of wet cloth are put on the forehead of person having fever, the water in the cloth absorbs heat from hot forehead to get vaporise. It helps to decrease the extra heat in the body caused due to high fever consequently helps to reduce body fever.

hope it helps..

Answer 2

Answer:

this is because boiling water does not have the kinetic energy where as steam has kinetic energy which produces more severe burns than boiling water at the same temperature.

we are able to SIP hot tea faster from a saucer rather than a cup because in a saucer there is more surface area as compared to the cup as we know evaporation takes place faster in large surface area having things as surface area increases the rate of evaporation.

when a person have high temperature its body temperatures becomes higher than a body having normal temperature. If we put strips of wet cloth on the forehead of a person suffering from high fever, the water evaporates taking heat from the body. Thus moist strips will lower his or her body temperature.

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