Question: What is the specific heat capacity of a substance if 2000 J of heat raises its temperature from 20°C to 60°C for 1 kg of the substance?

Options:

1. 1000 J/kg°C
2. 2000 J/kg°C
3. 500 J/kg°C
4. 3000 J/kg°C

Correct Answer: 1000 J/kg°C

Solution:

Specific heat capacity (c) is calculated as c = Q / (m * ΔT) = 2000 J / (1 kg * 40°C) = 50 J/kg°C.