Advertisements
Advertisements
प्रश्न
Will the value of specific heat’capacity and specific latent heat of a substance change if the scale is °F instead of °C?
उत्तर
The specific heat capacity will change if the scale is °F instead of °C. This is because it is the heat needed to raise the temperature of a unit of the substance by one degree. Since the size of the Fahrenheit degee is not the same as that of the celsium degree, a change of scale will affect the specific heat capacity.
The specific latent heat will not change with a change of scale. This is because this quantity is simply the heat needed to change the state of 1 kg of a substance at its melting/boiling point without any change in temperature. It is thus heat per unit mass and does not depends upon the scale of temperature used.
APPEARS IN
संबंधित प्रश्न
A liquid X has the maximum specific heat capacity and is used as a coolant in Car Radiators. Name the liquid X.
Water is used in hot water bottles for fomentation. Give a reason.
It is generally cold after a hail-storm then during and before the hail storm. Give reason.
State the effect of enhancement of green house effect.
Explain, why temperature in hot summer, falls sharply after a sharp shower?
Read the passage and answer the questions based on it.
If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat-resistant box then no energy can flow from inside the box or come into the box. In this situation, we get the following principle.
Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the ‘Principle of heat exchange’.
- Where does heat transfer take place?
- In such a situation which principle of heat do you perceive?
- How can this principle be explained in short?
- Which property of the substance is measured using this principle?
_______ is defined as the amount of heat required to raise the temperature of 1kg of a substance by 1°C.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
The difference between the two molar specific heats of gas is 9000 J/kg K. If the ratio of the two specific heats is 1.5, calculate the two molar specific heats.
