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Steam is passed into a calorimeter with ...

Steam is passed into a calorimeter with water having total thermal capacity `110 cal//gm` and initial temperature `30^@C`. If the resultant temperature is `90^@C`, the increase in the mass of the water is

A

12 gm

B

`1.2 gm`

C

5 gm

D

`12.4 gm`

Text Solution

Verified by Experts

The correct Answer is:
A
From principle of calorimetry
`(mS)_(water) Delta theta_(1) = m(L_(steam) + S Delta theta_(2))`
`(mS)_(water) = 110, S_(w) = 1, L_(ice) = 540`,
`Delta theta_(1) = 60 & Delta theta_(2) = 10`.
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