A 100.0-g sample of water at 27.0oC is poured into a 71.0-g sample of water at 89.0oC. What will be the final temperature of the water? (Specific heat capacity of water = 4.184 J/goC.)

The final temperature will be

Explanation:

Calculating the heat released or absorbed for the process:

In a system, the total amount of heat released is equal to the total amount of heat absorbed.

OR

......(1)

where,

C = heat capacity of water =

= mass of water of sample 1 = 100.0 g

= mass of water of sample 2 = 71.0 g

= final temperature of the system = ?

= initial temperature of water of sample 1 =

= initial temperature of the water of sample 2 =

Putting values in equation 1, we get:

Hence, the final temperature will be

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the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.