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प्रश्न
Write a short note.
Specific heat capacity
Write a short note.
Specific capacity
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उत्तर
- The amount of heat energy required to raise the temperature of a unit mass of an object by 1°C is called the specific heat or specific heat capacity of that object.
- SI unit of specific heat capacity is J/kg °C and CGS unit is cal/g °C
- It is denoted by ‘c’ and given by formula: c = `"Q"/("m"Delta "T")`
- Specific heat is a property of a substance and is different for different substances.
- Higher the value of specific heat capacity of the substance, higher is the amount of heat energy required to raise its temperature by 1 °C.
- The specific heat capacity of object is measured using principle of heat exchange.
संबंधित प्रश्न
Define heat capacity and state its SI unit.
Heat supplied to a solid change it into liquid. What is this change in the phase called?
Give one example where high specific heat capacity of water is used as heat reservoir ?
It is generally cold after a hail-storm then during and before the hail storm. Give reason.
How does green house effect help in keeping the temperature of earth’s surface suitable for living of human beings?
What is the specific heat capacity of boiling water?
Define heat capacity.
m kg of a substance of specific heat capacity s J/kg °C is heated so that its temperature rises from θ1°C to θ2°C. Write down the expression for the heat Q supplied.
Give two reasons as to why copper is preferred over other metals for making calorimeters.
A piece of ice is heated at a constant rate. The variation of temperature with heat input is shown in the graph below:
(i) What are represented by AB and CD?
(ii) What conclusion can you draw regarding the 110°c nature of ice from the above graph?
Calculate the amount of heat released when 5.0 g of water at 20°C is changed into ice at 0°C.
(Specific heat capacity of water = 4.2 J/g°C
Specific latent heat of fusion of ice = 336 J/g)
The heat capacity of the vessel of mass 100 kg is 8000 J/°K. Find its specific heat capacity.
Derive Meyer’s relation for an ideal gas.
For a gas, `"R"/"C"_"v"=0.4`, where R Is universal gas constant and Cv is the molar specific heat at constant volume. The gas is made up of molecules, which are ______
Two uniform brass rods A and B of length land 2l and radii 2r and r respectively are heated to the same temperature. The ratio of the increase in the volume ofB to that of A is ____________.
Two cylinders of equal height and radius are made of copper and aluminum. Which of them conducts heat faster?
