Show ALL equations, significance, units, and work in solving following problems. Use dimensional analysis whenever possible.
1. A 500 g piece of iron changes 7°C when heat is added. How much heat energy produced this change in temperature?
2. When 300. cal of energy is lost from a 125 g object, the temperature decreases from 45.0°C to 40.0°C. What is the specific heat of this object?
3. 1,200 cal of heat energy is added to a liquid with a specific heat of 0.57 cal/g°C. If the temperature increases from 20.°C to 33°C, what is the mass of the liquid?
4. A piece of food is burned in a calorimeter that contains 200.0 g of water. If the temperature of the water rose from 65.0°F to 105.0°F, how much heat energy was contained in the food?
5. If the tested food in problem #4 had a mass of 10.0 grams, how many food calories per gram were contained in the food?
6. If a piece of aluminum metal with a mass of 65.5 hectograms has a temperature of 50.0 o C and it is dropped into a swimming pool full of water at 25.0 oC, how much heat energy was transferred to the pool water?
Cp for Al is 0.8897 J/gCo
7. A hot cup of tea is often a beverage of choice in the winter because it warms us up. The temperature of the tea is 50.0oC and the normal body temperature is 37.2oC. If you drink a cup of tea with a mass of 256.3 grams, how much heat energy was transferred to your body? Cp of water = 4.184 J/gCo
8. How much energy is required to heat a #10 iron nail with a mass of 7.0 grams from 250 oC until it becomes red hot at 7500 oC.
9. If 5750 joules of energy are added to 455 grams of granite at 24.00 C, what is the final temperature of the granite? Cp granite is 0.79 J/g oC.
10. If a piece of aluminum with a mass of 3.99 g and a temperature of 100.0 oC is dropped in 10.0 cm3 of water at 21.0 oC, what will be the final temperature of the system? (Hint: Remember the density of water is 1.00 g / mL)
11. A piece of unknown metal with a mass of 5.19 g is heated to 100.00 oC and dropped into 10.0 mL of water at 22.00 oC. The final temperature of the system is 23.83 oC. What is the specific heat capacity of the metal? Attempt to identify the metal using the attached data.
12. If a piece of cadmium with a mass of 37.60 g and a temperature of 100.0 oC is dropped into 25.00 cc of water at 23.0 oC, what will be the final temperature of the
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