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Specific Heat and Heat Capacity Worksheet

1 The temperature of 335 g of water changed from 24.5oC to 26.4oC. How much heat did this sample absorb? c for water = 4.18 J/goC (ans. 2.66 kJ)

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2. How much heat in kilojoules has to be removed from 225g of water to lower its temperature from 25.0oC to 10.0oC? (ans. –14.1 kJ)

3. To bring 1.0kg of water from 25oC to 99oC takes how much heat input? (ans. 309 kJ)

4. An insulated cup contains 75.0g of water at 24.00oC. A 26.00g sample of metal at 82.25oC is added. The final temperature of the water and metal is 28.34oC. What is the specific heat of the metal? (ans 0.971 J/goC )

5. A calorimeter has a heat capacity of 1265 J/oC. A reaction causes the temperature of the calorimeter to change from 22.34oC to 25.12oC. How many joules of heat were released in this process? (ans. 3.52 kJ released )

6. What is the specific heat of silicon if it takes 192J to raise the temperature of 45.0g of Si by 6.0oC? (ans. 0.71 J/goC)

7. Aqueous silver ion reacts with aqueous chloride ion to yield a white precipitate of solid silver chloride. When 10.0 mL of 1.00M AgNO3 solution is added to 10.0mL of 1.00 M NaCl solution at 25oC in a calorimeter a white precipitate of AgCl forms and the temperature of the aqueous mixture increases to 32.6oC. Assuming that the specific heat of the aqueous mixture is 4.18 J/goC, that the density of the mixture is 1.00 g/mL, and that the calorimeter itself absorbs a negligible amount of heat, calculate the amount of heat absorbed in kJ/mol of Ag+. (ans. -64 kJ/mol)

8. Assuming that Coca Cola has the same specific heat as water ( 4.18 J/goC), calculate the amount of heat in kJ transferred when one can ( about 350g) is cooled from 25oC to 3oC . (ans. 32.2 kJ of heat was transferred)

9. What is the specific heat of

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