Properties Of Solids And Liquids Question 432
Question: A student takes 50gm wax (specific heat = 0.6$ kcal/kg{}^\circ C $ ) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively
Options:
A) $ 500cal, 50{}^\circ C $
B) $ 1000cal, 100{}^\circ C $
C) $ 1500cal, 200{}^\circ C $
D) $ 1000cal, 200{}^\circ C $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Since specific heat $ =0.6 kcal/g x {}^\circ C=0.6 $
$ cal/gx{}^\circ C $ From graph it is clear that in a minute, the temperature is raised from $ 0{}^\circ C $ to $ 50{}^\circ C $ . $ \Rightarrow $ Heat required for a minute $ =50\times 0.6\times 50 $ =1500 cal. Also from graph. Boiling point of wax is$ 200{}^\circ C $ .
