Thermometry Calorimetry And Thermal Expansion Question 228
Question: A container contains hot water at $ 100{}^\circ C $ . If in time $ T_{1} $ temperature falls to $ 80{}^\circ C $ and the time $ T_{2} $ temperature falls to $ 60{}^\circ C $ form $ 80{}^\circ C $ , then
Options:
A) $ T_{1}=T_{2} $
B) $ T_{1}>T_{2} $
C) $ T_{1}<T_{2} $
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Rate of coiling$ =\frac{-d\theta }{dt}\propto ( \frac{{\theta_{1}}+{\theta_{2}}}{2}-{\theta_{0}} ) $ In second case average temperature will be less hence rate of coiling will be less. Therefore time taken will be more than 4 minutes.
BETA
