7. The 2.2 kg window in Derrick's car heated up to 120" C because it sat in the school parking lot for 7 hours. If the total amount of heat energy gained by the glass is 169401.8 J, what was the initial temperature of the window? (glass - cp = 837 J/kgoC) 8. DeHaan is on KP. He is heating an iron skillet on a stove in preparation for braising some sirloins for the crew. The temperature of the skillet increases from 23 to 115 degrees Celsius. If the total thermal energy gained by the skillet is 20608 J, what is the mass of the skillet? (iron - Cp = 448 J/kgoc) 8 . 9. Although it is 35 degrees Celsius outside, the 10,000 g of water in Lauren's water bottle has only warmed up from 18 to 29 degrees Celsius in the past 6 hours. How much thermal energy does the water gain? (water - Cp = 4187 J/kgoc) 9 10. Caroline is boiling eggs to dye for Easter in a 4.4 kg aluminum pan. The pan increases in temperature from 28 to 98 degrees Celsius. How much thermal energy does the pan gain? (aluminum - Cp = 899 J/kgoC) 104. Emily is testing her baby's bath water and finds that it is too cold, so she adds some hot water from a kettle on the stove. If Emily adds 2.0 kg of water at 80 . C to 20.0 kg of bath water at 27 C, what is the final temperature of the bath water? (water - Cp = 4187 J/kg.C) 5. Dominique is fishing and one of his lead weights is left lying in the sun. He picks it up and realizing how hot it is, puts it in the tray of his cooler for a few minutes. Calculate how much heat is lost from the 0.86 kg lead weight as it cools from 78 C to 30 C. (lead - cp = 128 J/kgoC) 5 . 6. Liz is baking a pie and has a piece of aluminum foil lying on the rack under the pie to keep drippings from burning on the bottom of the stove. When she pulls the aluminum out of the oven its temperature is 95 C. she puts it in the sink where it immediately cools to 75. C. If the total amount of heat energy lost form the foil is 75516. J, what is the mass of the foil? (aluminum - Cp = 899 J/kgoc) 6