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Name: ____________________________________________________ Period: __________ Date: ___________________ 1. The temperature of an 9.0 g sample of metal changed from 25°C to 30°C when it absorbed 414 J of heat. What is the specific heat of this sample? 2. Determine the specific heat of a material if an 65 g sample absorbed 70 J as it was heated from 22°C to 37°C. 3. What is the specific heat of a substance if 143 cal are required to raise the temperature of a 321-g sample by 18 C? 4. What is the amount of heat required to raise the temperature of 541 g of aluminum by 13 C? (specific heat of aluminum = 0.21 cal/gC) oC, m is measured in grams (g), and q is measured in Joules (J), what are the units for specific heat capacity? 6.) What is the temperature change of a 120 g piece of aluminum whose specific heat is 1.89 J/goC after 1800 J of heat energy is applied? 7.) A beaker containing 250.0 g of water is heated with 1500.0 J of heat energy. If the temperature of the water changed from 22.0000oC to 23.4354oC, what is the specific heat of water? 8.) Heat energy equal to 25,000 J is applied to a 1200 g brick whose specific heat is 2.45 J/goC. a) What is the change in temperature of the brick? b) If the brick was initially at a temperature of 25.0oC, what is the final temperature of the brick? 9.) The temperature of an 16.0 g sample of metal changed from 20°C to 50°C when it absorbed 900 J of heat. What is the specific heat of this sample? 10.) If 50.0 mL of water containing HCl is mixed with 60.0 mL of water containing NaOH in a calorimeter such that the initial temperature of each solution was 24.0°C and the final temperature of the mixture is 33.0°C, how much heat (in kJ) is released in the reaction? Assume that the densities of the solutions are 1.00 g/mL. 11.) Determine the specific heat of a material if an 30 g sample absorbed 125 J as it was heated from 15°C to 40°C. 12.) What is the specific heat of a substance if 3500. cal are required to raise the temperature of a 300.-g sample by 10. C? 13.) What is the heat of reaction (H) for the combustion (with O2) of benzene, C6H6 to form carbon dioxide and water? Write the balanced equation for the reaction. Standard heats of formation: C6H6 = +48.50 kJ O2 = 0.0 kJ CO2 = -393.5 kJ H20 = -285.8 kJ