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JEE Advanced Model Paper 4 with solutions for online practice
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© examsnet.com
Question : 24
Total: 54
At constant pressure 200g of water is heated from 10° C to 20° C . Thus, increases in entropy is ( molar heat capacity of water at constant pressure is 75.3
J
K
.
−
1
m
o
l
−
1
) ( Given log (1.03) = 0.015)
29.0
J
K
−
1
227.0
J
K
−
1
-227.0
J
K
−
1
-25.0
J
K
−
1
Validate
Solution:
ΔS = 2.303 n
C
p
log
(
T
2
T
1
)
= 2.303 ×
200
18
× 75.3 × log
(
293
283
)
= 28.9
J
K
−
1
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