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250 g of water and equal volume of alcoh...

250 g of water and equal volume of alcohol of mass 200 g are replaced successively in the same calorimeter and cool from `60^@C` to `55^@C` in 130 s and 67 s, respectively. If the water equivalent of the calorimeter is 10 g, then the specific heat of alcohol in `cal//g^@C` is

A

`1.30`

B

`0.67`

C

`0.62`

D

`0.985`

Text Solution

Verified by Experts

The correct Answer is:
C
Rate of cooling of water = Rate of cooling of alcohol
`implies ((250+10) xx 1xx(5))/(130) = ((200s + 10)xx5)/(67)`
`implies ` Specific heat of alcohol s = `0.62`
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