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In an industrial process 10 kg of water ...

In an industrial process 10 kg of water per hour is to be heated from `20^@C` to `80^@C`. To do this steam at `150^@C` 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 `90^@C`. How many kilograms of steam is required per hour (specific heat of steam`=1 cal//g^@C`, Latent heat of vapourization`=540 cal//g`)?

A

1 gm

B

1 kg

C

10 gm

D

10 kg

Text Solution

Verified by Experts

The correct Answer is:
B
Let 'm' kg of steam is required for this process

`m_(w) xx S_(w) xx (80 - 20)`
=`m xx S_(steam) xx(150 -100)+mL_(steam)+mS_(w) (100-theta)`.
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