A19.0g sample of brass, which has a specific heat capacity of 0.375·j*g^−1°c−, is dropped into an insulated container containing 300.0g of water at 20.0°c and a constant pressure of 1atm. the initial temperature of the brass is 81.7°c.
1. assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. be sure your answer has significant digits.

The final temperature is 20.3 °C

Explanation:

Considering that:-

Heat gain by water = Heat lost by brass

Thus,  

Where, negative sign signifies heat loss

Or,  

For water:

Mass = 300.0 g

Initial temperature = 20.0 °C

Specific heat of water = 4.184 J/g°C

For brass:

Mass = 19.0 g

Initial temperature = 81.7 °C

Specific heat of water = 0.375 J/g°C

So,  

Hence, the final temperature is 20.3 °C

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