In an industrial process, 10 kg of water per hour is to be heated from 
to 
. To do this, steam at 
is passed from a boiler into a copper coil immersed in water. The steam condenses in the coil and is returned to the boiler as water at 
, how many kg of steam is required per hour?
(Take, specific heat of steam 
per 
, latent heat of vaporisation 
)
Text Solution
Verified by ExpertsB
Suppose 
gram steam is required per hour.
Heat is released by steam in following three steps:
(i) When steam at 
steam at 
(ii) When steam at 
water at 
(iii) When water at 
water at 
Hence, total heat given by the steam,
… (i)
Heat taken by 10 kg water,
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