Advertisements
Advertisements
Question
In an experiment. 17 g of ice is used to bring down the temp. of 40 g of water from 34°C to its freezing point. The sp. heat capacity of water is 4.25 J/g°C. Calculate sp. latent heat of ice.
Solution
Heat gained by ice at 0°C to convert to water at 0°C = Heat lost by water from 34°C to 0°C
17 x L = 40 x 4.25 x 34
17 L = 5780
L = 340 J/g
APPEARS IN
RELATED QUESTIONS
How is the transference of heat energy by radiation prevented in a calorimeter?
What is the principle of Calorimetry?
Name the law on which principle of Calorimetry is based
Give scientific reasons for the following:
Bottled drinks are cooled more effectively when surrounded by lumps of ice than by cold water at 0°.
Calculate the time taken by an immersion heater, which supplies energy at the rate of 7000 J/minute to raise temp. of 5 kg water from 22°C to 47°C.
Which contains more heat: 1 G water at 100°C or 1 g steam at 100°C? Give reason.
What energy change would you Expect to take place in the molecules of a substance when it undergoes:
(i) a change in its temperature?
(ii) a change in itsstate without any change in its temperature?
A heater supplies heat at the rate of 800 J/s. Find the time required to convert 50g of ice at -20°C into superheated steam at 140°C.
(Given: Specific heat of ice = 2.1 J/g, latent heat of ice = 340 J/gm, latent heat of steam = 2240 J/gm, specific heat of steam = 2.1 J/gm and specific heat of water = 4.2 J/gm.)
A calorimeter is a device used to measure the ______.
