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प्रश्न
Which contains more heat: 1 G water at 100°C or 1 g steam at 100°C? Give reason.
उत्तर
1 gram of water at 100°C requires 540 calories of heat to get converted into 1 gram of steam at 100°C. So, steam has more heat.
संबंधित प्रश्न
Define calorimetry ?
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.
1 kg of ice at 0o is heated at constant rate and its temperature is recorded after every 30 s till steam is formed at 100o C. Draw a temperature time graph to represent the change of phase.
Why does atmospheric temperature fall after hail storm?
What happens to the average kinetic energy of the molecules as ice melts at 0°C?
A copper calorimeter of mass 50g contains 100g of water at 20°C. A metallic piece of mass 250 g is heated to 100°C and is then dropped into the calorimeter. The contents of the calorimeter are well stirred and its final highest temperature is recorded to be 28 °C. If the specific heat capacity of water is 4.2 J/g°C and of copper is 0.4 J/g°C, find:
(i) the heat gained by water,
(ii) the heat gained by calorimeter,
(iii) total heat supplied by the metal piece, and
(iv) the specific heat capacity of metal.
Find the final temperature when a mass of 80g of water at 100°C is mixed with a mass of 40g of water at 25°C.
50 g of ice at 0°C is added to 300 g of a liquid at 30°C. What will be the final temperature of the mixture when all the ice has melted? The specific heat capacity of the liquid is 2.65 Jg-1 °C-1 while that of water is 4.2 J g-1 °C-1. Specific latent heat of fusion of ice = 336 Jg-1.
If you apply equal amount of heat to a solid, liquid, and gas individually, which of the following will have more expansion?
