Question

why steam at 100'c is better purpose than water at 100'c

Answer 1

steam at 100°C also have latent heat of boiling which it have acquired during conversion from liquid to gas and thus it have more energy then boiling waterat 100°C. More heat available fromsteam at 100 deg. C. Steam while condensing gives out latent heat of evaporation.

Answer 2

steam has more pressure than water has.. both at 100'c