F. HANDWRITTEN THEN BOX THE FINAL ANSWERS

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LATENT HEAT Solve the following problems; 1. How many calories of heat are needed to raise the temperature of 75g of water from 20 . C to 80 . C. 2. How much heat is liberated when 50g of water is cooled from 100 . C to 20 . C 3. One hundred grams of aluminum at 100 C is mixed with 100 g of water at 10 . C. What is the final temperature of the mixture? 4. A block of metal of mass 100 g is heated to 100 . C. It is then immersed in 100g of water at 0 . C in a calorimeter of mass 50 g and specific heat is 0.2. If the final temperature of them mixture is 70 . C, what is the specific heat of the metal.? 5. Four hundred grams of aluminum at 100 . C is dropped into 100 g of water at 20 . C contained in a copper calorimeter of mass 80 g. What is the final temperature of the mixture? 6. If 5 kg of water freezes at 0 C, how many kilocalories of heat are liberated? 7. How many calories of heat are needed to vaporize 500g of water at 100 . C ? 8. How many calories of heat are liberated when 50 g of steam is converted to ice at 0 . C