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संबंधित प्रश्न
What is a calorimeter?
0.5 kg of lemon squash at 30° C is placed in a refrigerator which can remove heat at an average rate of 30 J s−1. How long will it take to cool the lemon squash to 5°C? Specific heat capacity of squash = 4200 J g−1K−1.
10g of ice at 0℃ absorbs 5460 J of heat energy to melt and change to water at 50℃. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg-1 K-1.
Give scientific reasons for the following:
Sand mixed with salt is often spread over the icy roads in winter.
A bucket contains 10 liters of water at 80°C. Cold water at 25°C is run from a tap into the bucket of hot water for 20 seconds and the temp. Of the water in the bucket falls to 50°C.
(a) Calculate the rate at which cold water came out of the tap.
(b) State an assumption made in the above calculation.
How is the loss of heat due to radiation minimised in a calorimeter?
Why does atmospheric temperature fall after hail storm?
40g of ice at 0°C is used to bring down the temperature of a certain mass of water at 60°C to 10°C. Find the mass of water used.
[Specific heat capacity of water = 4200 J kg-1 °C-1]
[Specific latent heat of fusion of ice = 336 × 103 J kg-1]
The process of converting a substance from gaseous state to solid state is called _______.
