Advertisements
Advertisements
प्रश्न
Water in lakes and ponds do not freeze at once in cold countries. Give a reason is support of your answer.
Advertisements
उत्तर
The specific latent heat of fusion of ice is sufficiently high (=336 J g-1), and so to freeze water, a large quantity of heat has to be withdrawn. Hence, it freezes slowly and thus keeps the surroundings moderate.
APPEARS IN
संबंधित प्रश्न
What amount of heat must be supplied to 2.0 x 10-2 kg of nitrogen (at room temperature) to raise its temperature by 45 °C at constant pressure? (Molecular mass of N2 = 28; R = 8.3 J mol-1 K-1.)
Ice cream appears colder to the mouth than water at 0℃. Give reason.
State three ways to minimize the global warming.
What is carbon tax?
A liquid X has specific heat capacity higher than the liquid Y. Which liquid is useful as coolant in car radiators.
What are the factors on which the quantity of heat given to a body depends?
State factors on which the amount of heat radiated by a body depends.
The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:
- Calculate specific heat capacity of water.
- Heat released in the region BC.
Conductors have generally high specific heat capacities and insulators have low specific heat capacities.
