Answer: Water.
- A Iron
- B Copper
- C Water
- D Lead
Correct answer: C. Water
Explanation: Water has an unusually high specific heat capacity (about 4186 J/kg·K), much higher than most metals, which is why it is used as a coolant.
During a phase change (melting or boiling), temperature stays constant while heat is absorbed entirely as latent heat (Q=mL); temperature only rises again once the substance is fully in its new phase.
Concept context
Temperature scales, thermal expansion, calorimetry, and the three modes of heat transfer including radiation laws.