A heater supplies heat at a constant rate to a solid. The temperature-heat graph shown below has BC and DE flat. Match List I with List II.
List - I
List - II
(P) Segment AB
(1) Solid warming
(Q) Segment BC
(2) Melting
(R) Segment CD
(3) Liquid warming
(S) Segment DE
(4) Vaporization

Question

A heater supplies heat at a constant rate to a solid. The temperature-heat graph shown below has BC and DE flat. Match List I with List II.

TestHub · Accepted Answer

Rising segments mean temperature changes; flat segments are phase changes at the melting then boiling point. P-1, Q-2, R-3, S-4. Answer (A).

Physics - Heat & Thermo Question with Solution | TestHub