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0.3 kg of hot coffee , which is at 70^@C...

0.3 kg of hot coffee , which is at `70^@C` is poured into a cap of mass 0.12 kg. Find the final equilibrium temperature . Take room temperature as `20^(@)C , S_("coffee") = 4080J//kg - K and S_("cup")=1020J//kg - K`

A

`45^@C`

B

`55^@C`

C

`65^@C`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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