Question
A solid body of constant heat capacity 1 J/°C is being heated by keeping it in contact with reservoirs in two ways:
(i) Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies the same amount of heat.
(ii) Sequentially keeping in contact with 8 reservoirs such that each reservoir supplies the same amount of heat. In both the cases body is brought from an initial temperature 100°C to final temperature 200°C. Entropy change of the body in the two cases respectively is:
-
ln2,4ln2
-
ln2,ln2
-
ln2,2ln2
-
2ln2,8ln2
Solution
B.
ln2,ln2
Since entropy is a state function, therefore a change in entropy in both the processes must be same .
