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प्रश्न
Find the odd one out and give its explanation.
विकल्प
cal/g
cal/g °C
kcal/kg °C
erg/g °C
उत्तर
cal/g
Explanation-
cal/g is a unit of specific latent heat while others are units of specific heat.
APPEARS IN
संबंधित प्रश्न
State two characteristics of a good thermion emitter.
State the effect of an increase of impurities on the melting point of ice.
A molten metal of mass 150 g is kept at its melting point 800℃. When it is allowed to freeze at the same temperature, it gives out 75,000 J of heat energy.
- What is the specific latent heat of the metal?
- If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to -50℃?
Explain the following temperature vs time graph.
What do you mean by the statement?
'The specific latent heat capacity of fusion of ice is 336 J per g'?
What is the name given to the energy absorbed during a phase change?
Explain why water is used in hot water bottles for fomentation and also as a universal coolant.
Why does weather become pleasant when it starts freezing in cold countries?
The specific latent heat of vaporisation of steam is 2260 J/g. Comment on this.
Explain, why no tracks are left on the ice during ice skating?
What observation you will record and how will you determine the specific latent heat of fusion of ice?
Calculate the total amount of heat required to convert 100g ice at 0°C to steam at 100°C.
(Specific latent heat of fusion of ice = 336 J/g, specific latent heat of vaporization of steam = 2260 J/g, specific heat capacity of water = 4.2 J/g°C).
Steam at 100°C is passed over 1000 g of ice at 0°C. After some time, 600 g of ice at 0°C is left and 450 g of water at 0°C is formed. Calculate the specific latent heat of vaporization of steam (Given: specific heat capacity of water = 4200 J/kg°C, specific latent heat of fusion of ice = 336,000 J/kg.)
The latent heat of vaporisation is a term referred for the conversion of gas into liquid.
Write scientific reason.
Use a pressure cooker to cook food in cold air.
For the same mass of ice and ice-cold water, why does ice produce more cooling than ice-cold water?
600 g of copper at 50°C is mixed with lOOOg water at 20°C. Find the final temperature of the mixture. The specific heat capacity of copper is 0.4 Jg-1°C-1 and that of water is 4.2 Jg-1°C-1
Calculate the amount of heat required to convert 200g of ice at 0°C into the water at 0°C Specific latent heat of fusion of ice = 336 Jg-1
Calculate the total amount of heat energy required to melt 200 g of ice at 0°C to water at 100°C. (Specific latent heat of ice = 336 Jg-1, specific heat capacity of water = 4.2 Jg-1 °C-1)
