Three Liquids With Masses m1, m2, m3 are Thoroughly Mixed. If Their Specific Heats Are s1, s2, s3 and Their Temperature θ1, θ2, θ3 respectively, Then The Temperature Of The Mixture Is:    

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Question

Three liquids with masses m1m2m3 are thoroughly mixed. If their specific heats are s1s2s3 and their temperature θ1θ2θ3 respectively, then the temperature of the mixture is:    

Solution

Correct option is

 

Let the final temperature be oC. Total heat which can be supplied by the three liquids in coming down to

0oC = m1s1θ1 + m2s2θ2 + m3s3θ3    

The heat is used up in raising the temperature from 0oC to toC of all the three liquids.     

So, total heats used up by three liquids.   

                                                   

                                          

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