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Question

If two liquids at different temperatures are mixed, then the final temperature of the mixture of liquids can be obtained by using:

यदि अलग-अलग तापमान पर दो तरल पदार्थों को मिलाया जाता है, तो तरल पदार्थों के मिश्रण का अंतिम तापमान इसका उपयोग करके प्राप्त किया जा सकता है:

A.

Zeroth law of thermodynamics

B.

First law of thermodynamics

C.

Second law of thermodynamics

D.

Third law of thermodynamics

Answer ( Option B)

First law of thermodynamics

Solution

Initially when the two liquids are mixed, the temperature is undefined because there is heat exchange between the liquids. There exists a transient phased after which it will reach an equilibrium. This equilibrium temperature can be found by conservation of energy i.e. first law of thermodynamics.

Hence, the correct option is (B)

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