The specific heat capacity of water is 4200 J/kg°C. What is the energy required to raise the temperature of 1 kg of water from 20°C to 80°C?
Correct: C
The energy required to raise the temperature of 1 kg of water is given by Q = mcΔT, where m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Substituting the given values, we get Q = (1 kg) * (4200 J/kg°C) * (80 - 20)°C = (1 kg) * (4200 J/kg°C) * (60)°C = 252,000 J = 252 kJ.