Principle of Calorimetry
Trending Questions
1 kg of ice at 0∘C is mixed with 1 kg of steam at 100∘C. What will be the composition of the system when thermal equilibrium is reached? Latent heat of fusion of ice = 3.36 × 105 J kg−1 and latent heat of vaporization of water = 2.26 × 106 J kg−1
2kg steam
2 kg ice
665gm water, 1.335 kg steam
665 gm steam, 1.335 kg water
Relation between specific heat and degree of freedom.
On which law the principle of method of mixtures is based?
What is temperature? How it is measured?
The temperature of 600 g of cold water rises by 15∘C when 300 g of hot water at 50∘C is added to it. What was the initial temperature of the cold water?
Give one example each where high specific heat capacity of water is used (i) as coolant, (ii) as heat reservoir.
45 g of water at 50∘C in a beaker is cooled when 50 g of copper at 18∘C is added to it.The contents are stirred till a final constant temperature is reached.Calculate the final temperature.The specific heat capacity of copper is 0.39 Jg−1 K−1 and that of water is 4.2 Jg−1 K−1.State the assumption used.
What is the principle of method of mixture ? What other name is given to it ? Name the law on which this principle is based .
Why is the loss of heat due to radiation minimised in a calorimeter?
A 5 g piece of ice at −20∘C is put into 10 g of water at 30∘C. Assuming that heat is exchanged only between the ice and the water. Then find the heat required for phase change. Specific heat capacity of ice =2100 Jkg−1∘C−1. Specific heat capacity of water =4200 Jkg−1∘C−1 and latent heat of fusion of ice 3.36×105 J kg−1.
4680 J
1680 J
3680 J
2680 J
A hot solid of mass 60 g at 100∘C is placed in 150 g of water at 20∘C. The final temperature recorded is 25∘C. Calculate the specific heat of solid. (Specific heat of water = 4200J/kg/∘C)
50J/kg/0C
100J/kg/0C
300J/kg/0C
700J/kg/0C
A 5g piece of ice at −20∘C is put into 10g of water at 30∘C. Assuming that heat is enchanged only between the ice and the water, find the final temperature of the mixture. Specific heat capacity of ice =2100Jkg−1∘C−1. Specific heat capacity of water =4200Jkg−1∘C−1 and latent heat of fusion of ice 3.36×105 J kg−1.
20∘ C
10∘ C
0∘ C
30∘ C
Why is a calorimeter box made up of Copper?
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 kg−1 K−1.
A mass of 50 g of a certain metal at 150∘C is immersed in 100 g of water at 11∘C. The final temperature is 20∘C. Calculate the specific heat capacity of the metal. Assume that the specific heat capacity of water is 4.2 J g−1 K−1.
Name two factors on which the heat energy liberated by a body on cooling depends.
(a) What is calorimeter?
(b) Name the material of which it is made of. Give two reasons for using the material stated by you.
(c) Out of the three metals A, B and C of specific heat capacity 900 J kg−1 ∘C−1, 380Jkg−1 ∘C−1 and 460Jkg−1 ∘C−1 respectively, which will you prefer for calorimeter? Give reason.
(d) How is the loss of heat due to radiation minimized in a calorimeter?
What are the contributions of chemistry in the following field?
Cosmetics.
Heat energy lost by a hot body is equal to heat energy gained by the cold body. Which of the following option/options below is/are associated with the above statement?
Law of gravitation
Law of conservation of energy
m1c1ΔT1 = m2c2ΔT2
None of these
Name two factors on which the heat energy liberated by body depends?
In an experiment, 17 g of ice is used to bring down the temperature of 40 g of water at 34∘C to its freezing temperature. The specific heat capacity of water is 4.2 J g−1 K−1. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.
A mass m1 of a substance of specific heat capacity c1 at temperature t1 is mixed with a mass m2 of other substance of specific heat capacity c2 at a lower temperature t2.Deduce the expression for the temperature t of the mixture.State the assumption made, if any.
A piece of ice of mass 40 g is added to 200 g of water at 50oC. Calculate the final temperature of water when all the ice has melted.Specific heat capacity of water=4200 J kg−1 K−1 and specific latent heat of fusion of ice =336 ×103 J kg−1.
___________ is used to measure the amount of heat gained or lost by a substance.
Calorimeter
Speedometer
Barometer
Odometer
A calorimeter is made of a thin sheet of copper so that
It can absorb a large amount of heat from the contents of the calorimeter
It can absorb less amount of heat from the surroundings
It can absorb a small amount of heat from the contents of the calorimeter
It can liberate a small amount of heat to the surroundings
20.26∘C
10.26∘C
30.26∘C
40.26∘C
200 g of hot water at 80∘C is added to 300 g of cold water at 10∘C.Neglecting the heat taken by the container, calculate the final temperature of the mixture of water.Specific heat capacity of water =4200 J kg−1 K−1 .
A solid of mass 0.15 kg is heated from 10 °C to 90 °C. If the specific heat capacity of the solid is 390 J kg-1 °C-1, find the heat absorbed by the solid.
