Advertisements
Advertisements
प्रश्न
उत्तर
Melting of scale
On celsius scale 0°C
On Fahrenheit scale F = `9/5` C + 32
= 0 + 32
= 32°F
APPEARS IN
संबंधित प्रश्न
1 kg of ice at 0°C is heated at a constant rate and its temperature is recorded after every 30 s till steam is formed at 100℃. Draw a temperature time graph to represent the change of phase.
Give scientific reasons for the following:
Sand mixed with salt is often spread over the icy roads in winter.
40 g of ice at -16°C is dropped into water at 0°C, when 4 g of water freezes into ice. If specific heat capacity of ice is 2100 J/kg°C, what will be the latent heat of fusion of ice?
Calculate the time taken by an immersion heater, which supplies energy at the rate of 7000 J/minute to raise temp. of 5 kg water from 22°C to 47°C.
Fill in the following blank using suitable word:
Whenever mechanical work is done, .......... Is produced.
What energy change would you Expect to take place in the molecules of a substance when it undergoes:
(i) a change in its temperature?
(ii) a change in itsstate without any change in its temperature?
Explain briefly, how you would determine the specific heat capacity of a liquid?
Calculate the heat energy that will be released when 5.0 kg of steam at 100°C condenses to form water at 100°C. Express your answer in S.I. unit. (Specific latent heat of vaporization of steam is 2268 kj/kg.)
20 g of ice at 0°C is added to 200g of water at 20°C. Calculate the drop in temperature ignoring the heat capacity of the container. (Specific latent heat of ice = 80 cal/g)
The process of converting a substance from gaseous state to solid state is called _______.
