Question

Three objects (A, B, and C) are originally far apart. Object B is brought into contact with object A, and no heat flows from one object to the other. Then, object B is moved away from object A and brought into contact with object C. When object B touches object C, the temperature of the two objects changes. Objects B and C eventually reach thermal equilibrium.

(a) Give as much information as you can about the original temperatures of the three objects.

(b) Give as much information as you can about the final temperatures of the three objects.

Answer 1

a)As there is no exchange of heat between A and B, so they must be at same temperature. But when B touches C the temperature of both B and C changes which imples, that C is at higer temperature than that of B and C continues to transfer heat to B untill thermal equilibrim reaches between the two.

b)Since A is not touch to any of the B or C so A's tempertaure remains same what it was. But The final temp of B has risen from its initial value to some value. Since C has given heat out of it to B, C must have a drop in its intial temperature.