When ice absorbs latent heat at a constant pressure to melt from solid to liquid state at constant temperature, which of the following changes are…
When ice absorbs latent heat at a constant pressure to melt from solid to liquid state at constant temperature, which of the following changes are happening?A. Entropy of the system is increasing.B. Cp (heat capacity at constant pressure) of the system is infinite or undefined.C. Enthalpy of the system is increasing.D. Cp of the system is zero. Choose the correct answer :
Select an option to attempt
Correct Answer: Option C
Explanation
Ice melting: thermodynamic changes at constant temperature and pressure:• Statement A (Entropy increases): Ice (highly ordered crystal) → liquid water (disordered).✔ TRUE• Statement B (Cp is infinite/undefined at phase transition): Heat capacity. At a first-order phase transition, heat is absorbed (latent heat) with NO temperature change (). Therefore(undefined/infinite). ✔ TRUE• Statement C (Enthalpy increases): Melting is an endothermic process (absorbs latent heat = 6.01 kJ/mol for ice).✔ TRUE• Statement D (Cp is zero): FALSE — Cp is infinite, not zero.Answer: A, B, C are correct (Option 3).