An electric heater with constant heat supply rate is used to convert a certain amount of liquid ammonia to saturated vapour at high pressure. The heater takes 14 minutes to bring the liquid at 
to the boiling point of 
and 92 minutes to convert the liquid at the boiling point wholly to vapour. If the specific heat capacity of liquid ammonia is 
, the latent heat of vaporisation of ammonia in 
is
Text Solution
Verified by ExpertsThe correct answer is:
C
Given, let Q be the rate of heat supplied and M be the mass of liquid ammonia.
Dividing these, we get
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