Question

(5 marks)
a) When a solid melts, the temperature of the system does not change after the
melting point is reached even when we continue to supply more heat. Give reasons.
b) Define latent heat of vaporisation. Between steam and hot boiling water, which
could cause more serious burns? Give reasons.​

Answer 1

Answer:

a ) It happens because of latent heat of fusion , when any solid starts melting , then the heat energy that we are applying is used to loosen the intermolecular force of particles . So,when a solid melts ,the temperature of the system does not change after the melting point is reached even when we continue to supply heat.

b) Answer: Steam will produce more severe burns than boiling water because steam has more heat energy than water due to its latent heat of vaporisation. Answer: ... This amount of heat is called LATENT HEAT (Which energy helps to change the phase from one to another).