Question

SPECIFIC HEAT OF A METAL Specific heat is an intensive property, which is the amount of heat required to raise the temperature of 1 gram substance by 1°C. Specific heat units areJ/g °C. Solve the following problems using your lecture notes: 1. When 8.50 g of metal, initially at 82 °C, is placed in 45 g water at 20°C, the final temperature of the metal and water is 22 °C. Calculate the specific heat of the metal in J/gºC. (specific heat of water s = 4.18 Jg "C). 2. A piece of iron (5 g) at 150°C with a specific heat of 0.45 J/g °C is placed in 100 mL of water at 25 °C. After the temperatures have equilibrated, what is the final temperature of the water? 3. A piece of iron (25 g) at 50 °C is placed in 250 mL of water. The final temperature is 30°C. What was the initial temperature of water? 4. A piece of gold (specific heat of 0.129 J/g °C) at 190°C is placed in 165 mL of water. The initial temperature of water is 25°C. The final temperature is 45 °C. What is the mass of the piece of gold? 5. A 10 g piece of copper at 145 °C is placed in 150 mL of water. The initial temperature of water is 25 °C. The final temperature is 45 °C. What is the specific heat of copper?