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.
$(c)$ Water kept in an earthen pot becomes cool during summer.

(N/A) Steam at $373 K$ $(100^{\circ} C)$ contains more energy than boiling water at the same temperature because it possesses additional latent heat of vaporisation.
$(b)$ $A$ saucer has a larger surface area than a cup. Since evaporation is a surface phenomenon,a larger surface area increases the rate of evaporation,leading to faster cooling of the tea.
$(c)$ An earthen pot has numerous microscopic pores. Water continuously evaporates through these pores. The energy required for this evaporation is absorbed from the remaining water inside the pot,causing the water to cool down.