Chemistry – Math Problem Solving essay

Chemistry 107 – Problem SolvingHandout #3
Name:____________________Be sure to show work and box all final answers.1. How many joules of energy are required to raise the temperature of 75 g of water from 20.0 oC to 70.0 oC?2. A 250.0 g metal bar requires 5.866 kJ to change its temperature from 22 oC to 100.0 oC. What is the specific heat of the metal?3. If 40.0 kJ of energy is absorbed by 500.0 g of water at 10.0 oC, then what is final temperature of the water?4. Anthracite coal, 1.0 g, produces 7.000 x 103 cal when burned. How many joules of energy does this represent? How many grams of anthracite are required to raise the temperature of 4.0 L of water from 20.0 oC to 100.0 oC?5. When a 43.0 g sample of metal at 100.0 oC is added to 38.0 g of water at 23.72 oC, the final temperatures of both the metal and the water are 29.33 oC. The specific heat of water is 4.184 J/goC. What is the specific heat of the metal?6. A 325.0 g piece of gold at 427.0 oC is dropped into 200.0 mL of water at 22.0 oC. The specific heat of gold is 0.131 J/goC. Calculate the final temperature of the mixture.
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