Specific Heat Capacity Practice Questions PDF

- f - Name______________________________________________ Per_______ Date__________________ PRACTICE: PHASE CHANGE All matter can exist in the solid, liquid, or gaseous phases. Water is the most common example, not only because of its abundance but also because the temperatures for all three...

- f - Name______________________________________________ Per_______ Date__________________ PRACTICE: PHASE CHANGE All matter can exist in the solid, liquid, or gaseous phases. Water is the most common example, not only because of its abundance but also because the temperatures for all three phases are common. (WATER: Lf = 334 J/g; Lv = 2260 J/g) use: LATENT HEAT L → phase change - no temperature change: fusion (melting) Q = m Lf vaporization (boiling) Q = m Lv use: SPECIFIC HEAT c → temperature change within a phase: Q = mc∆T 1. How many joules are needed to change 1 gram of 0ºC ice to water at 0ºC? 2. How many joules are needed to change the temperature of 1 gram of water by 1ºC? 3. How many joules are needed to change 1 gram of 100ºC boiling water to 100ºC steam? 4. Fill in the number of joules at each step below for changing the state of 1 gram of 0º ice to 100ºC steam. 5. How many joules are needed to melt 1 gram of 0ºC ice and turn it to water at a room temperature of 23ºC? 6. A 50 g sample of ice at 0ºC is placed in a glass beaker that contains 200 g of water at 49ºC. a. How much heat is needed to melt the ice? b. By how much would the temperature of the water change if it gave up this much heat to the ice? c. What will be the final temperature of the mixture? (Disregard any heat absorbed by the glass or given off by the surrounding air.) 7. One gram of steam at 100ºC condenses, and the water cools to 22ºC a. How much heat is released when the steam condenses? b. How much heat is released when the water cools from 100ºC to 22ºC? c. How much heat is released altogether? 8. In a household radiator 1000 g of steam at 100ºC condenses, and the water cools to 90ºC. a. How much heat is released when the steam condenses? b. How much heat is released when the water cools from 100ºC to 90ºC? c. How much heat is released altogether? Name______________________________________________ Per_______ Date___________________ PRACTICE: SPECIFIC HEAT CAPACITY 1. Given 132.8J of energy is required to heat 11.17g of aluminum from 15.73°C to 28.94°C find the specific heat of aluminum. 2. Given that 242.2J of energy is required to heat 81.6g of copper from 27.5°C to 35.2°C, find the specific heat of copper. 3. Given the specific heat of lead is 0.129 J/g·K and that it takes 93.4J of energy to heat a sample of lead from 22.3°C to 40.4°C find the mass of the lead. 4. Given that the specific heat of copper 0.385J/g·K and that it takes 209.9J of energy to heat a sample of copper from 24.3°C to 49.9°C, find the mass of the copper. 5. Given that the specific heat of copper is 0.385J/g·K and if 81.2J of heat is applied to 17.8g of copper by how much will the temperature of the copper increase? 6. Given that the specific heat of silver is 0.235J/g·K and if 29.1J of heat is applied to11.4 g of silver by how much will the temperature of the silver increase? 7. Given that the specific heat of chromium is 0.455J/g·K find the final temperature after 35.9J of energy is removed from 11.7g of chromium at 28.5°C. 8. Given that the specific heat of iron is 0.450J/g·K find the final temperature after 103.4J of energy is removed from 98.2g of iron at 87.3°C. 9. Given that the specific heat of gold is 0.129 J/g·K find the amount of energy in joules required to raise the temperature of 3.125 g of gold from 20.3°C to 31.1°C. 10. Given that the specific heat of copper is 0.385 J/g·K find the amount of energy in joules required to raise the temperature of 19.45 g of copper from 27.4°C to 35.2°C. 11. If 0.871 g of a metal thought to be gold uses 1.47 J of energy to heat it from 25.2°C to 38.3°C. Confirm that the metal is gold. 12. If 59.1 g of pure metal uses 890.9 J of energy to heat it from 26.1°C to 59.6°C, identify the metal. SPECIFIC HEAT METAL CAPACITY (J/g·K) Aluminum 0.897 Chromium 0.455 Cobalt 0.46 Copper 0.385 Gold 0.129 Iron 0.450 Lead 0.129 Magnesium 1.0 Silver 0.235 Tin 0.22 Zinc 0.388