The gases can be liquefied by

Once Ravi and Aman were cooking rice in the kitchen and accidentally Aman's hand got a severe burn while opening the lid of the cooking vessel. Immediately,Ravi applied ice on his hand,then applied an ointment,and told him to cook carefully as he had been hurt by steam,and steam causes more severe burns. Aman thanked Ravi and smiled.
$(a)$ According to you,what kind of qualities are shown by Ravi?
$(b)$ How does steam produce more severe burns than boiling water?

Convert the following temperatures to the Celsius scale.
$(a)$ $293 \, K$
$(b)$ $470 \, K$

During the evaporation process,the heat is:

Boiling process is a

Evaporation is called as