Question

Water is heat on a stove. The temperature of water rises from

(i) 20 C to 30 C. (ii) 30 C to 40 C (iii) 80 C to 90 C .
In which case the change in entropy is greatest.

Answer 1

Answer:

the change in entropy is same as same as entropy isthe difference

Answer 2

Answer:

I think the answer is i > ii> iii

Explanation:

The reason is that ΔS = ∫(dQ/T)

so since dS ∝ dQ ∝ dT (from dQ=nCdT sincevolume is constant for container) so find the refernce temperatures for the processes and ΔT.

Average temperratures:

i ---> 25 ii--->35 iii--->85

Since T_avg are in the order i<ii<iii

S(entropy) are in the order i>ii>iii

dT orders: i = ii = iii ,

So finally the entropy order starting from the highest is:

i>ii>iii