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104g of water at 30°C is taken in a calorimeter made of copper of mass 42 g. When a certain mass of ice at 0°C is added to it, the final steady temperature of the mixture after the ice has melted, was found to be 10°C. Find the mass of ice added. [Specific heat capacity of water = 4.2 Jg–1°C–1 ; Specific latent heat of fusion of ice = 336 Jg–1; Specific heat capacity of copper = 0.4 Jg–1°C–1] .
Concept: Specific Heat Capacity
The meaning of the statement ‘Specific heat capacity of water is 4200 J kg-1 K-1’ is:
Concept: Natural Phenomena and Consequences of High Specific Heat Capacity of Water
The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:
- Calculate specific heat capacity of water.
- Heat released in the region BC.
Concept: Specific Heat Capacity
Two metals A and B have specific heat capacities in the ratio 2 : 3. If they are supplied the same amount of heat then
Which metal piece will show a greater rise in temperature given their masses is the same?
Concept: Specific Heat Capacity
Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then
Which metal piece will have greater mass if the rise in temperature is the same for both metals?
Concept: Specific Heat Capacity
Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then
If the mass ratio of metal A and metal B is 3:5 then calculate the ratio in which their temperatures rise.
Concept: Specific Heat Capacity
Two metals A and B have specific heat capacities in the ratio 2:3. If they are supplied same amount of heat then
If specific heat capacity of metal A is 0.26 Jg-1 0C-1 then calculate the specific heat capacity of metal B.
Concept: Specific Heat Capacity
Why is water used as a coolant in radiators of a car?
Concept: Specific Heat Capacity
Specific heat capacity of a substance X is 1900 Jkg-1°C-1 means ______.
Concept: Specific Heat Capacity
Thermal capacities of substances A and B are same. If mass of A is more than mass of B then:
Which substance will have more specific heat capacity?
Concept: Specific Heat Capacity
Why does it become pleasantly warm when the lakes start freezing?
Concept: Melting and Freezing
Water freezes to form ice. What change would you expect in the average kinetic energy of the molecules?
Concept: Explanation of Latent Heat of Melting based on Kinetic Model
What mass of ice at 0°C added to 2.1 kg water, will cool it down from 75°C to 25°C? Given Specific heat capacity of water = 4.2 Jg-1 °C-1, Specific latent heat of ice = 336 Jg-1.
Concept: Specific Heat Capacity of Some Common Substances
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
Concept: Radioactivity
A radiation X is focused by a particular device on the bulb of a thermometer and mercury in the thermometer shows a rapid increase. Name the radiation X
Concept: Radioactivity
Answer the following questions based on a hot cathode ray tube
Name the charged particles
Concept: Radioactivity
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
Concept: Radioactivity
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
Concept: Radioactivity
State three factors on which the rate of emission of electrons from a metal surface depends
Concept: Radioactivity
