Section 7.10: Chapter 7 Test

Comprehensive test covering all topics in Chapter 7: Temperature, Heat, Heat Capacity, Calorimetry, Latent Heat, and Heat Transfer.

1. Calculate the heat required to raise 3 kg of water from 20°C to 80°C. (c = 4186 J/kg·°C)
2. 200 g of ice at 0°C is added to 500 g of water at 25°C. Find the final temperature and mass of melted ice. (Lf = 334 kJ/kg)
3. An electric kettle delivers 1500 W to 1.5 kg of water. How long does it take to heat the water from 25°C to 100°C?
4. Determine the specific heat capacity of a substance if 800 J raises the temperature of 100 g by 20°C.
5. Calculate the energy needed to convert 250 g of water at 100°C to steam at 100°C. (Lv = 2260 kJ/kg)
6. Two metal blocks, 2 kg and 3 kg, at 150°C and 100°C respectively, are placed in contact. Find final equilibrium temperature. (c1 = 400 J/kg·°C, c2 = 500 J/kg·°C)
7. A 500 g aluminum rod (c = 900 J/kg·°C) is cooled from 120°C to 30°C. Calculate the heat lost.
8. Steam at 100°C condenses in a 250 g copper calorimeter containing 0.5 kg of water at 20°C. Determine final temperature.
9. Explain how heat transfer occurs in conduction, convection, and radiation, giving one example for each.
10. A block of ice at -5°C is placed in 0.5 kg of water at 25°C. Determine final temperature and amount of ice melted. (c_ice = 2.1 kJ/kg·°C, Lf = 334 kJ/kg)