Advertisements
Advertisements
Question
A calorimeter is kept in a wooden box to insulate it thermally from the surroundings. Why is it necessary?
Advertisements
Solution
A calorimeter is kept in a wooden box to insulate it thermally from the surroundings because in order to determine the specific heat capacity, the total heat transferred must be known. Heat must not be exchanged with the surroundings, otherwise the principle of calorimeter would not stand valid.
APPEARS IN
RELATED QUESTIONS
The calorie is defined as 1 cal = 4.186 joule. Why not as 1 cal = 4 J to make the conversions easy?
Refer to the plot of temperature versus time (figure) showing the changes in the state of ice on heating (not to scale).
- The region AB represents ice and water in thermal equilibrium.
- At B water starts boiling.
- At C all the water gets converted into steam.
- C to D represents water and steam in equilibrium at boiling point.
Work done in converting one gram of ice at -10°C into steam at 100°C is ______.
The specific heat of a substance is given by C = a + bT, where a = 1.12 kJ kg-1K-1 and b = 0.016 kJ-kg K-2. The amount of heat required to raise the temperature of 1.2 kg of the material from 280 K to 312 K is ______.
500 g of water and 100 g of ice at 0°C are in a calorimeter whose water equivalent is 40 g. 10 g of steam at 100°C is added to it. Then water in the calorimeter is ______.
(Latent heat of ice = 80 cal/g, Latent heat of steam = 540 cal/g)
540 g of ice at 0°C is mixed with 540 g of water at 80°C. The final temperature of the mixture will be ______.
What does the word "calorimetry" mean?
Why is the inner vessel of a calorimeter made of copper?
The principle of calorimetry is based on which law?
What is the purpose of the outer jacket and air gap in a calorimeter?
In the method of mixtures, why should the hot sample be transferred quickly into the calorimeter?
What is the role of the stirrer in a calorimetry experiment?
The specific heat capacity of water is approximately:
Why is water commonly used as the liquid in a calorimeter?
