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1. A 50-g sample of iron at 100oC is put into 75 g of water at...

1. A 50-g sample of iron at 100oC is put into 75 g of water at 0oC. What is the final temperature of the mixture? (The specific heat of iron is 0.11 cal/g Co.)

2. A machine part consists of 0.10 kg of iron and 0.16 kg of copper. How much heat is added to the gear if the temperature increases by 35oC? [Hint: Compute the heat required for each metal and add the numbers. State your answer in joules.]

3. If 2.0 kg of water at 0oC is to be vaporized (i.e. converted to steam), how much heat must be added?

4. A 4.0-kg aluminum block is originally at 10oC. If 160 kJ of heat is added to the block, what is its final temperature? (The specific heat for aluminum is 0.22 kcal/kg Co or 900 J/kg Co.)

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