thermometer A sample of brass, which has a specific heat capacity of 0.375 J g C

Question

thermometer A sample of brass, which has a specific heat capacity of 0.375 J g C, is put into a calorimeter (see sketch at right) that insulated contains 100.0 g of water. The brass sample starts off at 93.4 °C and the temperature of the water starts off at 19.0 oC. When container the temperature of the water stops changing it's 22.5 °C. The pressure remains constant at 1 atm. waterH Calculate the mass of the brass sample. Be sure your answer is rounded to 2 significant digits sampleHO a calorimeter ?×10

Explanation / Answer

Heat lost by brass= heat gained by water

MCdt= mcdt'

Where

M= mass of brass = ?

C= specific heat capacity of brass= 0.375 J/goC

dT'= change in temperature of brass= 93.4-22.5= 70.9 oC

m= mass of water= 100.0 g

c= specific heat capacity of water= 4.184 J/ goC

dt'= Change in temperature of water= 22.5-19.0 = 3.5 oC

Plug the values we get M= 550.8 g

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