4.1 We wish to determine the specific heat of a new alloy. A 0.150 kg sample of the alloy is heated to 540°C. It is then quickly placed in 400 g of water at 10°C, which is contained in a 200 g aluminum calorimeter cup. The final temperature of the entire system is 30.5°C. Calculate the specific heat of the alloy. [HINT: The specific heal capacity of aluminium and water are, respectively, CAI = 900 J/kg•K, Cwater = 4186 J/kg•K] %3D

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4.1
We wish to determine the specific heat of a new alloy. A 0.150 kg sample of the alloy is heated to 540°C.
It is then quickly placed in 400 g of water at 10°C, which is contained in a 200 g aluminum calorimeter
cup. The final temperature of the entire system is 30.5°C. Calculate the specific heat of the alloy.
[HINT: The specific heal capacity of aluminium and water are, respectively, CAI = 900 J/kg•K,
Cwater = 4186 J/kg·K]
4.2
A model steam engine of 1.00 kg mass pulls eight cars of 1.00 kg mass each. The cars start from rest and
reach a in a time of 3.00 s while moving a distance of 4.50 m. During that time the engine takes in 153 J
of heat. Calculate the change in the internal energy of the engine.
Transcribed Image Text:4.1 We wish to determine the specific heat of a new alloy. A 0.150 kg sample of the alloy is heated to 540°C. It is then quickly placed in 400 g of water at 10°C, which is contained in a 200 g aluminum calorimeter cup. The final temperature of the entire system is 30.5°C. Calculate the specific heat of the alloy. [HINT: The specific heal capacity of aluminium and water are, respectively, CAI = 900 J/kg•K, Cwater = 4186 J/kg·K] 4.2 A model steam engine of 1.00 kg mass pulls eight cars of 1.00 kg mass each. The cars start from rest and reach a in a time of 3.00 s while moving a distance of 4.50 m. During that time the engine takes in 153 J of heat. Calculate the change in the internal energy of the engine.
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