Answer: 11600 K.
- A 2900 K
- B 11600 K
- C 5800 K
- D 8700 K
Correct answer: B. 11600 K
Explanation: By Wien law λT is constant, so T = 5800 × (500/250) = 11600 K.
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.