A piece of ice at 0o C is heated at a constant rate and its temperature recorded at regular intervals till steam is formed at 100o C. Draw a temperature-time graph to represent the change in phase? Label the different parts of your graph.
The temperature-time graph represent the change in phase. The graph is as given below: 
i) Name a gas caused by the Greenhouse effect.
ii) Which property of water makes it an effective coolant?i) Water in lakes and ponds do not freeze at once in cold countries. Give a reason in support for your answer.
ii) What is the principle of calorimetry?
iii) Name the law on which the principle is based.
iv) State the effect of an increase of impurities on the melting point of ice.Define the term ‘Heat Capacity’ and state its S.I. unit.
What is meant by Global warming?
i) It is observed that the temperature of the surroundings starts falling when the ice in a frozen lake starts melting. Give a reason for the observation.
ii) How is the heat capacity of the body related to its specific heat capacity?Mock Test Series
