Bernard Boyer

2022-07-17

Suppose you mix two identical blocks of metal, one having a temperature of ${10}^{\circ }$ and the other ${20}^{\circ }$. Is it possible for the cold block to cool to ${5}^{\circ }C$ and the warm block to warm to ${25}^{\circ }C$?

A. Yes, because it adheres to the second law of thermodynamics.
B. No, because it will violate the zeroth law of thermodynamics.
C. Yes, because it adheres to the zeroth law of thermodynamics.
D. No, because it will violate the first law of thermodynamics.

escobamesmo

Expert

Temperature of identical objects is 10 C and 20 C , the equilibrium temperature would be:
$\frac{{10}^{\circ }C+{20}^{\circ }C}{2}={15}^{\circ }C$
the first law of thermodynamics prohibits the flow of heat from a colder body to hotter body, thus the colder body cannot attain ${5}^{\circ }C$ and warmer body cannot attain ${25}^{\circ }C$ .Thus option D is correct.

Do you have a similar question?