Question: What is the heat required to raise the temperature of 3 kg of aluminum from 25°C to 75°C? (Specific heat of aluminum = 900 J/kg°C)

Options:

1. 135000 J
2. 90000 J
3. 180000 J
4. 45000 J

Correct Answer: 135000 J

Solution:

Using Q = mcΔT, Q = 3 kg * 900 J/kg°C * (75°C - 25°C) = 3 * 900 * 50 = 135000 J.