Give reasons for the following:
$(i)$ $A$ liquid generally flows easily.
$(ii)$ Ice at $0^{\circ} C$ appears colder to the mouth than water at $0^{\circ} C$. Why?
$(iii)$ Doctors advise putting strips of wet cloth on the forehead of a person having a high temperature.
$(i)$ $A$ liquid generally flows easily.
$(ii)$ Ice at $0^{\circ} C$ appears colder to the mouth than water at $0^{\circ} C$. Why?
$(iii)$ Doctors advise putting strips of wet cloth on the forehead of a person having a high temperature.
(N/A) $(i)$ Liquid molecules are able to slide over one another due to slightly weaker intermolecular forces of attraction compared to solids,allowing them to flow.
$(ii)$ This is due to the latent heat of fusion. Ice at $0^{\circ} C$ absorbs additional heat energy from the mouth to change its state into water at $0^{\circ} C$. Therefore,it feels colder than water at the same temperature.
$(iii)$ Water,while evaporating,absorbs the necessary latent heat of vaporization from the patient's body,which helps in lowering the body temperature.
$(ii)$ This is due to the latent heat of fusion. Ice at $0^{\circ} C$ absorbs additional heat energy from the mouth to change its state into water at $0^{\circ} C$. Therefore,it feels colder than water at the same temperature.
$(iii)$ Water,while evaporating,absorbs the necessary latent heat of vaporization from the patient's body,which helps in lowering the body temperature.
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