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.   

                                                   

                                          

SIMILAR QUESTIONS

Q1

Which of the following is the smallest temperature?

Q2

The temperature at which the reading of a Fahrenheit thermometer will be double that of Centigrade thermometer is:

Q3

In a resistance thermometer the resistances at 0oC and 100oC are 6.74 and 7.74 ohm respectively. The temperature corresponding to 6.53 ohm resistance is:   

Q4

Which of the following has the highest specific heat? 

Q5

Which of the following has the highest specific heat? 

Q6

A liquid is being converted into vapours at its bp; the specific heat of liquid at this temperature will be:

Q7

Specific heat of a gas undergoing adiabatic change is:

Q8

Which of the following produces more servere burns? 

Q9

A body cools from 91oC to 89oC in 5 minutes when the room temperature is 20oC. Then it will cool from 71oC to 69oC in:   

Q10

80 gm of water at 30oC is poured on a large block of ice at 0oC. The mass of ice that melts is: