Advertisements
Advertisements
Question
With the help of a neat diagram, explain the working of a calorimeter.
Solution
-
A calorimeter is a device used to measure the amount of heat gained or lost by a substance.
-
It consists of a vessel made up of metals like copper or aluminum which are good conductors of heat and electricity.
-
The metallic vessel is kept in an insulating jacket to prevent heat loss to the environment.
Calorimeter -
There are two holes in it. Through one hole a thermometer is inserted to measure the temperature Of the Contents.
-
A stirrer is inserted through another hole for stirring the content in the vessel.
-
The vessel is filled with liquid which is heated by passing a current through the heating element.
-
Using this device we can measure the heat capacity of the liquid in the container.
APPEARS IN
RELATED QUESTIONS
A block of lead of mass 250 g, at 27°C was heated in a furnace till it completely melted. Find the quantity of heat required
(a) To bring the lead block upto its melting point,
(b) To completely melt the block at its melting point (Melting point of lead is 327°C, Sp. heat cap. of lead is 0.13 J/gk and latent heat of fusion of lead is 26 J/g)
A refrigerator converts 100 g of water at 20°C to ice at -10°C in 73.5 minutes. Calculate the average rate of heat extraction from water in watt. (Sp. heat of ice= 2100 J/kgK, sp. heat of water = 4200 J/kgK, Sp. latent heat of ice = 336000 J/kg.)
Fill in the following blank using suitable word:
Evaporation causes ..........
Out of the three metals A, B and C of specific heat 900 J kg-1 °C-1, 380 J kg-1 °C-1 and 460 J kg-1 °C-1 respectively, which will you prefer for calorimeter? Given reason.
A mass of 50 g of a certain metal at 150° C is immersed in 100 g of water at 11° C. The final temperature is 20° C. Calculate the specific heat capacity of the metal. Assume that the specific heat capacity of water is 4.2 J g-1 K-1.
What happens to the average kinetic energy of the molecules as ice melts at 0°C?
20 g of ice at 0°C is added to 200g of water at 20°C. Calculate the drop in temperature ignoring the heat capacity of the container. (Specific latent heat of ice = 80 cal/g)
If you apply equal amount of heat to a solid, liquid, and gas individually, which of the following will have more expansion?
Conduction is the way of heat transfer which takes place in a ______.
