Advertisements
Advertisements
प्रश्न
(b) 2000 J of heat energy is required to raise the temperature of 4 kg of a
metal by 3°c. Which expression gives the specific heat capacity of the metal?
विकल्प
2000/( 4x3) J/kg°C
`2000/4` x 4 Jjkg°C
2000 x `4/3` J/kg°C
4 x `3/2000` J/kg°C
2000 x `3/4` J/kg°C
Advertisements
उत्तर
2000/( 4x3) J/kg°C
APPEARS IN
संबंधित प्रश्न
Calculate the mass of ice required to lower the temperature of 300 g of water 40°C to water at 0°C.
(Specific latent heat of ice = 336 J/g, the Specific heat capacity of water = 4.2J/g°C)
What property of water makes it an effective coolant?
Why do the farmers fill their fields with water on a cold winter night?
Study the following procedure and answer the questions below:
1. Take 3 spheres of iron, copper and lead of equal mass.
2. Put all the 3 spheres in boiling water in a beaker for some time.
3. Take 3 spheres out of the water. Put them immediately on a thick slab of wax.
4. Note, the depth that each sphere goes into the wax.
i) Which property of substance can be studied with this procedure?
ii) Describe that property in minimum words.
iii) Explain the rule of heat exchange with this property.
What are other units of heat? Name and define them.
Give two reasons as to why copper is preferred over other metals for making calorimeters.
Ice-cream at 0°C feels colder than water at 0°C. Give reason for this observation.
How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
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.
