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प्रश्न
From the options given below the specific heat of _______ is maximum.
पर्याय
copper
silver
iron
mercury
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उत्तर
From the options given below the specific heat of iron is maximum.
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संबंधित प्रश्न
A child running a temperature of 101°F is given an antipyrin (i.e. a medicine that lowers fever) which causes an increase in the rate of evaporation of sweat from his body. If the fever is brought down to 98 °F in 20 min, what is the average rate of extra evaporation caused, by the drug? Assume the evaporation mechanism to be the only way by which heat is lost. The mass of the child is 30 kg. The specific heat of human body is approximately the same as that of water, and latent heat of evaporation of water at that temperature is about 580 cal g–1.
Define heat capacity and state its SI unit.
50 g of metal piece at 27°C requires 2400 J of heat energy so as to attain a temperature of 327°C . Calculate the specific heat capacity of the metal.
A solid metal weighing 150 g melts at its melting point of 800 °C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?
During the phase change does the average kinetic energy of the molecules of the substance increase?
Describe a method to determine the specific heat capacity of a solid, like a piece of copper ?
Explain the meaning of green house effect.
Name two green house gases ?
Give three reasons for the increase of green house gases.
What is meant by specific heat capacity?
Solve the following problems:
Equal heat is given to two objects A and B of mass 1 g. Temperature of A increases by 3°C and B by 5°C. Which object has more specific heat? And by what factor?
What change in heat energy occurs when lead at its melting point
solidifies without change in the temperature?
A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find its specific heat capacity in S.I unit.
State the condition for the flow of heat energy from one body to another.
Water falls from a height of 50 m. Calculate the rise in the temperature of water when it strikes the bottom.
(g = 10 ms-2; Specific heat capacity of water = 4200 J / kg°C)
Calculate the ratio of two specific heats of polyatomic gas molecules.
A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?
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.
Which method is used to determine the specific heat capacity of both solids and liquids by mixing a substance of unknown specific heat with water?
