In: Chemistry
2. A 155 g sample of iron metal at 120.0C is placed into 250.0 g of water at 20.0 °C in a calorimeter. When the system reaches thermal equilibrium, the temperature of the water in the calorimeter is 30.8C. Assume the calorimeter is perfectly insulated. What is the specific heat of iron? What is the amount of heat for 80.0 g piece of iron?
Heat lose of Iron = heat gain of water
mct = mct
155*C*(120-30.8) = 250*4.18*(30.8-20)
155*C*89.2 = 250*4.18*10.8
13826*C = 11286
C = 11286/13826 = 0.816j-C0/g
What is the amount of heat for 80.0 g piece of iron
q = mCt
= 80*0.816*(120-30.8)
= 80*0.816*89.2
= 5822.976joule