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

(A) Steam at $373 \, K$ will cause more severe burns.
This is because steam contains additional energy known as the latent heat of vaporization.
At $373 \, K$,water molecules in the steam state have absorbed extra heat to change their phase from liquid to gas.
When steam comes into contact with the skin,it releases this latent heat along with its thermal energy,resulting in more severe burns compared to water at the same temperature.