Advertisements
Advertisements
Question
What is meant by specific heat capacity?
Advertisements
Solution
Specific heat capacity of a body can be defined as the amount of heat energy required to raise the temperature of the unit mass of that body by 1°C (or 1 K).
It is given as:
s = `(Delta Q)/(DeltaT xx m)`
where,
ΔQ = Amount of heat energy supplied
ΔT = Rise in temperature
m = Mass of the body
APPEARS IN
RELATED QUESTIONS
The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.
Define heat capacity and state its SI unit.
What do you understand by the following statements:
The specific heat capacity of lead is 130 Jkg-1K-1.
Water in lakes and ponds do not freeze at once in cold countries. Give a reason is support of your answer.
Heat energy is supplied at a constant rate to 100g of ice at 0 °C. The ice is converted into water at 0° C in 2 minutes. How much time will be required to raise the temperature of water from 0 °C to 20 °C? [Given: sp. heat capacity of water = 4.2 J g-1 °C-1, sp. latent heat of ice = 336 J g-1].
A liquid X has the maximum specific heat capacity and is used as a coolant in Car Radiators. Name the liquid X.
What do you mean by the following statement?
The heat capacity of a body is 50 JK-1?
Write the expression for the heat energy Q received by the substance when m kg of substance of specific heat capacity c Jkg-1 k-1 is heated through Δt° C.
Find the time taken by a 500 W heater to raise the temperature of 50 kg of material of specific heat capacity 960 J kg-1K-1, from 18°C to 38° C. Assume that all the heat energy supplied by the heater is given to the material.
The ratio of specific heat capacity to molar heat capacity of a body _____________ .
The farmers fill their fields with water in winter. Give reason.
Why is specific heat capacity taken as a measure of thermal inertia?
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]
From the options given below the specific heat of _______ is maximum.
Write a short note.
Specific heat capacity
Decide the unit for specific heat capacity.
50 g of copper is heated to increase its temperature by 10° C. If the same quantity of heat is given to 5 g water, the rise in its temperature is [Specific heat of copper = 420 joule-kg-1 °C-1 , specific heat of water = 4200 joule-kg-I °C-1]
At same temperature and pressure of an ideal gas, ____________.
Two blocks P and Q of different metals having their mass in the ratio 2 : 1 are given same amount of heat. Their temperature rises by same amount. Compare their specific heat capacities.
