Advertisements
Advertisements
प्रश्न
Heat supplied to a solid change it into liquid. What is this change in the phase called?
Advertisements
उत्तर
Solid → liquid, melting
APPEARS IN
संबंधित प्रश्न
Give a mathematical relation between Heat Capacity and Specific Heat Capacity.
What do you mean by the following statement?
The heat capacity of a body is 50 JK-1?
Water property of water makes it an effective coolant?
The specific heat capacity of water is :
Name the radiations for which the green house gases are opaque ?
650 J of heat is required to raise the temp. of 0.25 kg of lead from 15°C to 35°C. Calculate the Sp. heat capacity of lead.
A. hot solid of mass 60 g at 100°C is placed in 150 g of water at 20° C. The final steady temperature recorded is 25°C. Calculate the specific heat capacity of the solid. [Specific heat capacity of water = 4200 J kg-1 °C-1]
Read this activity and answer the following questions.
- Take three spheres of iron, copper and lead. the lead of equal mass.
- Put all the three spheres in boiling water in the beaker for some time.
- Take the three spheres out of the water.
- All the spheres will be at a temperature 100 °C.
- Put them immediately on the thick slab of wax.
- Note, the depth that each of the sphere goes into the wax.
Questions:
- Which property is determined from this activity?
- Give name to that property.
- Explain the term principal of heat exchange with the help of this activity.
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside ______.
