Chemical Thermodynamics Question 45
Question: The molar heat capacity of water at constant pressure is $ 75J{{K}^{-1}}mo{{l}^{-1}} $ . When 1.0 kJ of heat is supplied to 100 g of water which is free to expand the increase in temperature of water is [CBSE PMT 2003]
Options:
A) 6.6 K
B) 1.2 K
C) 2.4 K
D) 4.8 K
Show Answer
Answer:
Correct Answer: C
Solution:
Heat capacity of water per gram $ =\frac{75}{18}=4.17J $
$ Q=mst $ ; $ 1000=100\times 4.17\times t $
$ t=\frac{1000}{100\times 4.17}=2.4K $ .
