Question

(i) Explain why, steam at 100$°$C is better for heating purposes than boiling water at 100$°$C.
(ii) Which produces more severe burns: boiling water or steam? Why?
(iii) State one condition necessary to liquefy gases (other than applying high pressure.)

Answer 1

(i) Steam has more energy than boiling water as it possesses the additional latent heat of vaporization. Therefore, steam at 100 $°$C is better for heating purposes.

(ii) Steam has more heat conserved as the latent heat of vaporization in comparison to boiling water, therefore steam produces more severe burns than boiling water.

(iii) The necessary condition to liquify gas is by compressing the gas at a temperature less than its critical temperature.