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m' mass of ice at 0^(@)C is put in same ...

m' mass of ice at `0^(@)C` is put in same mass of water. Find the temperature of water needed just to melt the ice completely.

A

`20^(@)C`

B

`40^(@)C`

C

`60^(@)C`

D

`80^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
D
As heat gain = Heat loss
`mL_(f) = ms Delta theta`
`rArr 80 cal = 1 cal // .^(@)C (theta - 0 .^(@)C)`
`rArr theta = 80^(@) C`
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