Advertisements
Advertisements
प्रश्न
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour.
पर्याय
Right
Wrong
उत्तर
1 kg of dry air at a temperature of 40 °C can hold a maximum of 49 g of water vapour- Right
APPEARS IN
संबंधित प्रश्न
Write the approximate value of specific latent heat of ice.
Explain the following:
The heat supplied to a substance during it change of state, does not cause any rise in its temperature.
Calculate the total amount of heat energy required to convert 100 g of ice at −10℃ completely into water at 100℃. Specific heat capacity of ice = 2.1 J g-1 K-1, specific heat capacity of water = 4.2 J g-1K-1, specific latent heat of ice = 336 J g-1.
Water expands on reducing its temperature below ______°C.
Define the following terms:
(i) Specific latent heat,
(ii) Specific latent heat of fusion.
A substance changes from its solid state to the liquid state when heat is supplied to it. What name is given to heat absorbed by the substance.
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?
Why water get cooled in a ‘Surahi’ in hot season?
Define the term ‘specific latent heat of fusion’ of a substance.
The specific latent heat of vaporisation of steam is 2260 J/g. Comment on this.
Derive an expression for the amount of heat given out or taken up, when its temperature falls or rises by t°C.
1 kg of water is contained in a 1.25 kW kettle. Assuming specific heat capacity of water = 4.2 J/g °C and specific latent heat of vaporization = 2260 J/g, calculate:
(i) the time taken for the temperature of water to rise from 25°C to its boiling point,
(ii) the mass of water which evaporates per minute from the boiling water.
When ice is converted into water : constant temperature : : before the water evaporates : _______
Specific latent heat of vaporisation : J/kg : : specific heat : _______
Write scientific reason.
The bottom of some steel utensils used for cooking is copper.
Who introduced the term latent heat?
The amount of heat energy required to melt a given mass of a substance at its melting point without any rise in its temperature is called as the ______.
