Question

When a body at 100°C is kept in contact with a similar body at 0°C, heat flows from the hotter body rol to the colder body and both come to 50 C. Is the on reverse process possible That is, if we put two similar bodies both at 50°C in contact, can heat flow from one body to the other

Answer 1

No, heat would not flow from one body to another.

If you use the formula for methods of mixtures,

mc(∅2-∅1)=mc(∅3-∅2)

Since they are similar, c is the same for both of them.

Change in temperature is equal to zero so there is no change.