Advertisements
Advertisements
प्रश्न
उत्तर
Whenever a substance goes through a phase change (like boiling), the energy goes into breaking up the interactions between molecules, and so the temperature stays constant until all the interactions are broken. Once whole of the substance has boiled, then any added heat will act to raise them temperature again.
APPEARS IN
संबंधित प्रश्न
How will you determine the specific heat capacity of a liquid like olive oil by the method of mixtures?
0.5 kg of lemon squash at 30° C is placed in a refrigerator which can remove heat at an average rate of 30 J s−1. How long will it take to cool the lemon squash to 5°C? Specific heat capacity of squash = 4200 J g−1K−1.
200 g mass of certain metal of 83°C is immersed in 300 g of water at 30°C the final temperature
is 33°C. Calculate the specific heat capacity of the metal Assume that the specific heat capacity
of water is `4.2 J g^-1K^-1`
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.
Explain, why are big tubs of water kept in underground cellars for storing fresh fruit and vegetables in cold countries.
Ice is more effective in cooling than the ice-water. Explain.
State two impacts of global warming on the life on earth.