A liquid at 30°C is poured very slowly into a Calorimeter that is at temperature of 110°C. The boiling temperature of the liquid is 80°C. It is found that the first 5 gm of the liquid completely evaporates. After pouring another 80 gm of the liquid the equilibrium temperature is found to be 50°C. The ratio of the Latent heat of the liquid to its specific heat will be _____________°C.
[Neglect the heat exchange with surrounding]
Answers
A liquid at 30°C is poured very slowly into a Calorimeter that is at temperature of 110°C. The boiling temperature of the liquid is 80°C. It is found that the first 5 gm of the liquid completely evaporates. After pouring another 80 gm of the liquid the equilibrium temperature is found to be 50°C. The ratio of the Latent heat of the liquid to its specific heat will be _____________°C.
[Neglect the heat exchange with surrounding]
Ans:270°C
Explanation:
CASE-1
(5C×50) + 5L = (C2)30 ----------(i)
where c is specific heat of liquid and C2 is specific heat of calorimeter
CASE-2:
80C(50-30)=(C2)(80-50) ---------(ii)
By Eq.(i) and (ii)
1600C = 250 + 5L
L/C = 1350/5
=270°C