The gases can be liquefied by

Which of the following will cause more severe burns and why?
$(a)$ Steam at $373 \, K$
$(b)$ Water at $373 \, K$

State whether the following statement is true or false:
Latent heat means the heat which can be seen easily.

$(a)$ "Evaporation causes cooling." Explain the reason for this effect.
$(b)$ Explain two examples from our daily life where we feel the effect of cooling due to evaporation.

Evaporation of a liquid takes place at

When suffering from a fever,which will lower your body temperature more effectively: ice or ice-cold water? Why?