Advertisements
Advertisements
प्रश्न
Fill in the following blank using suitable word:
The amount of heat required to change the state of a physical substance without any change of temperature is called .......... of the substance.
उत्तर
The amount of heat required to change the state of a physical substance without any change of temperature is called Latent heat of the substance.
APPEARS IN
संबंधित प्रश्न
A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find heat energy needed to warm it by 15°C.
Describe an experiment to show that there is absorption of heat energy when the ice melts.
Give scientific reasons for the following:
Bottled drinks are cooled more effectively when surrounded by lumps of ice than by cold water at 0°.
100 g of ice at -10°C is heated. It is converted into steam. Calculate the quantity of heat which it has consumed. (Sp. heat of ice = 2100J/kg°C, sp. heat of water= 4200 J/kgK, sp. heat of water = 42000 J/kgK, sp. latent heat of ice = 2260000 J/kg).
A refrigerator converts 100 g of water at 20°C to ice at -10°C in 73.5 minutes. Calculate the average rate of heat extraction from water in watt. (Sp. heat of ice= 2100 J/kgK, sp. heat of water = 4200 J/kgK, Sp. latent heat of ice = 336000 J/kg.)
Fill in the following blank using suitable word:
1 cal = .......... J
Ice is more effective in cooling than the ice-water. Explain.
200 g of hot water at 80°C is added to 300 g of cold water at 10 °C. Calculate the final temperature of the mixture of water. Consider the heat taken by the container to be negligible. [specific heat capacity of water is 4200 J kg-1 °C-1]
