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प्रश्न
With the help of a neat diagram, explain the working of a calorimeter.
उत्तर
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A calorimeter is a device used to measure the amount of heat gained or lost by a substance.
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It consists of a vessel made up of metals like copper or aluminum which are good conductors of heat and electricity.
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The metallic vessel is kept in an insulating jacket to prevent heat loss to the environment.
Calorimeter -
There are two holes in it. Through one hole a thermometer is inserted to measure the temperature Of the Contents.
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A stirrer is inserted through another hole for stirring the content in the vessel.
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The vessel is filled with liquid which is heated by passing a current through the heating element.
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Using this device we can measure the heat capacity of the liquid in the container.
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संबंधित प्रश्न
What is a calorimeter?
The melting point of naphthalene, a crystalline solid is 80℃ and the room temperature is 30℃. A sample of liquid naphthalene at 100℃ is cooled down to the room temperature. Draw a temperature time graph to represent this cooling.
The specific heat capacity of a substance A is 3,800 Jkg `"^(–1)K^(–1)` and that of a substance B is 400 `"^(–1)K^(–1)`. Which of the two substances is a good conductor of heat ? Give a reason for your answer.
Give scientific reasons for the following:
It is much easier to skate on rough ice than on glass.
Fill in the following blank using suitable word:
1 cal = .......... J
Which has more heat: 1 g of ice at 0°C or 1 g of water at 0°C? Give reason.
How is the loss of heat due to radiation minimised in a calorimeter?
A mass of 40g of brass of specific heat capacity 0.85 Jg-1 K-1 is heated in an oven and then quickly transferred into 240g of water at 30°C in a calorimeter of mass 60g and specific heat capacity 0.4 Jg-1 K-1. If the final temperature is 50°C. What was the temperature of the oven?
20 g of ice at 0°C is added to 200g of water at 20°C. Calculate the drop in temperature ignoring the heat capacity of the container. (Specific latent heat of ice = 80 cal/g)
50 g of ice at 0°C is added to 300 g of a liquid at 30°C. What will be the final temperature of the mixture when all the ice has melted? The specific heat capacity of the liquid is 2.65 Jg-1 °C-1 while that of water is 4.2 J g-1 °C-1. Specific latent heat of fusion of ice = 336 Jg-1.
