Advertisements
Advertisements
Question
(i) State whether the specific heat capacity of a substance remains the same when its state changes from solid to liquid.
(ii) Give one example to support your answer.
Advertisements
Solution
(i) No.
(ii) Specific heat of water 4.187 KJ/kg K
Specific heat of ice 2.103 KJ/kg K
APPEARS IN
RELATED QUESTIONS
Give one example where high specific heat capacity of water is used as cooling purposes?
Ice cream appears colder to the mouth than water at 0℃. Give reason.
What impact will climate changes have on the crops of food?
(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?
Name the substance which has maximum specific heat capacity.
Write two advantages of high specific heat capacity of water.
Explain, why do sandy soils, get heated up quickly as compared to wet soils?
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]
Numerical Problem.
How much heat energy is required to change 2 kg of ice at 0°C into water at 20°C? (Specific latent heat of fusion of water = 3,34,000 J/kg, Specific heat capacity of water = 4200 JKg–1K–1).
Calculate the amount of heat energy required to raise the temperature of 200 g of copper from 20°C to 70°C. Specific heat capacity of copper = 390 J kg-1 K-1.
