A system consists of two very large thermal reservoirs in contact with each other,one at temperature 300°C and the other at temperature 200°C.When 600 J of heat transfers from the 300°C reservoir to the 200°C reservoir,what is the change in entropy of this system?
A) 0.221 J/K
B) 1.00 J/K
C) 5.00 J/K
D) -1.00 J/K
E) -2.31 J/K

Question

Quizplus · Accepted Answer

The change in entropy is given by the heat transferred divided by the temperature difference:$$\Delta S = \frac{Q}{T_2 - T_1} = \frac{600 J}{573 K - 473 K} = 0.221 J/K$$

A System Consists of Two Very Large Thermal Reservoirs in Contact