Two substances are placed in contact within a perfectly insulated calorimeter until…
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Two substances are placed in contact within a perfectly insulated calorimeter until thermal equilibrium is reached.
(i) State the principle that governs the heat exchange which takes place inside the calorimeter.
(ii) Substance A of mass mA and substance B of mass mB have initial temperatures TA and TB respectively, with TA>TB. Without performing any numerical calculation, explain why the final equilibrium temperature Tf must always satisfy TB<Tf<TA.
(iii) Qualitatively describe how Tf will be affected if the mass of the hotter substance A is doubled while keeping all other quantities the same.