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When 20mL of a strong acid is added to 2...

When `20mL` of a strong acid is added to `20mL` of an alkali, the temperature rises by `5^(@)C` . If `200mL` of each liquid is mixed, the temperature rise will be

A

`5^(@)C`

B

`50^(@)C`

C

`20^(@)C`

D

`0.5^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
A
Heat evolved in the first case `=40xx5=200cal`
Heat evolved in the second case `=10` times to the first, that is `10xx200=2000cal`
`:. 2000=400xxDeltaT` or `DeltaT=5^(@)C` .
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