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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Water is used as a cooling agent. - Chemistry

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प्रश्न

Water is used as a cooling agent.

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उत्तर

Water has high specific heat. Water neither heats up nor cools down quickly. This property makes water an excellent cooling agent.

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Anomalous Expansion of Water
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अध्याय 8: Water - Exercise I [पृष्ठ १०७]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 8 Water
Exercise I | Q 6.1 | पृष्ठ १०७

संबंधित प्रश्न

Give reason of Ice floats on water.


Observe the following graph. Considering the change in volume of water as its temperature is raised from 0°C, discuss the difference in the behaviour of water and other substances. What is this behaviour of water called?


A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C, how much water can be heated with this energy?


Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C. 


Explain, why does a glass bottle completely filled with water and tightly capped burst when placed in a freezer?


A deep pond of water has its top layer frozen. What will be the likely temperature of water layer at the bottom of the pond?


The following diagrams illustrate three situations involving thermometers which are labeled A, Band C. In each situation the thermometers indicate different readings.

(i) What do you expect the approximate reading of the thermometer B and C would be? Give a reason for your answer.
(ii) How would the readings of A and B help you in calibrating a thermometer?


On a faulty thermometer, a lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?

Express 0°C in Kelvin.

Write scientific reason.

Fish can survive even in frozen ponds in cold regions.


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