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Calorimetry Physics - Calorimetry

Rajasthan Board (RBSE) - STD 12 Science - Physics (Rajasthan - English Medium). 41 questions in this chapter.

Question types

Calorimetry question types

41 questions across 5 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

41
Questions
5
Question groups
5
Question types
Sample Questions

Calorimetry questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 2M.C.Q (1 Marks)1 Mark
When a hot liquid is mixed with a cold liquid, the temperature of the mixture:
  1. First decreases then becomes constant.
  2. First increases then becomes constant.
  3. Continuously increases.
  4. Is undefined for some time and then becomes nearly constant.
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Q 3M.C.Q (1 Marks)1 Mark
The temperature of an object is observed to rise in a period. In this period:
  1. Heat is certainly supplied to it.
  2. Heat is certainly not supplied to it.
  3. Heat may have been supplied to it.
  4. Work may have been done on it.
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Q 4M.C.Q (1 Marks)1 Mark
The ratio of specific heat capacity to molar heat capacity of a body:
  1. Is a universal constant.
  2. Depends on the mass of the body.
  3. Depends on the molecular weight of the body.
  4. Is dimensionless.
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Q 5M.C.Q (1 Marks)1 Mark
Which of the following pairs represent units of the same physical quantity?
  • A
    Kelvin and joule.
  • B
    Kelvin and calorie.
  • C
    Newton and calorie.
  • ✓
    Joule and calorie.

Answer: D.

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Q 81 Marks Question1 Mark
A block of mass $100g$ slides on a rough horizontal surface. If the speed of the block decreases from $10\ ms^{-1}$ to $5\ ms^{-1},$ find the thermal energy developed in the process.
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Q 91 Marks Question1 Mark
A van of mass $1500\ kg$ travelling at a speed of $54\ kmh^{-1}$ is stopped in $10s$. Assuming that all the mechanical energy lost appears as thermal energy in the brake mechanism, find the average rate of production of thermal energy is cals$^{-1}$.
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Q 101 Marks Question1 Mark
Calculate the time required to heat $20\ kg$ of water from $10^\circ C$ to $35^\circ C$ using an immersion heater rated $1000W$. Assume that $80\%$ of the power input is used to heat the water. Specific heat capacity of water $= 42000J \ kg^{-1} K^{-1}$.
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Q 144 Marks Questions4 Marks
A person's skin is more severely burnt when put in contact with 1g of steam at 100°C than when put in contact with 1g of water at 100°C. Explain.
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Q 154 Marks Questions4 Marks
Indian style of cooling drinking water is to keep it in a pitcher having porous walls. Water comes to the outer surface very slowly and evaporates. Most of energy needed for evaporation is taken from the water itself and the water is cooled down. Assume that a pitcher contains $10\ kg$ of water and $0.2g$ of water comes out per second. Assuming no backward heat transfer from the atmosphere to the water, calculate the time in which the temperature decrease by $5^\circ C$. Specific heat capacity of water $= 4200J \ kg^{-1^\circ} C^{-1}$ and latent heat of vaporization of water $= 2.27 \times 10^6 J \ kg^{-1}$.
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Q 165 Marks Questions5 Marks
The temperatures of equal masses of three different liquids $A, B$ and $C$ are $12^\circ C, 19^\circ C$ and $28^\circ C$ respectively. The temperature when $A$ and $B$ are mixed is $16^\circ C,$ and when $B$ and $C$ are mixed, it is $23^\circ C$. What will be the temperature when $A$ and $C$ are mixed?
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Q 175 Marks Questions5 Marks
An aluminium vessel of mass $0.5\ kg$ contains $0.2\ kg$ of water at $20^\circ C$. A block of iron of mass $0.2\ kg$ at $100^\circ C$ is gently put into the water. Find the equilibrium temperature of the mixture. Specific heat capacities of aluminium, iron and water are $910\ J\ kg^{-1}-K^{-1}, 470\ J\ kg^{-1}-K^{-1}$ and $4200\ J\ kg^{-1}-K^{-1}$ respectively.
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Q 185 Marks Questions5 Marks
A piece of iron of mass $100g$ is kept inside a furnace for a long time and then put in a calorimeter of water equivalent $10g$ containing $240g$ of water at $20^\circ C.$ The mixture attains and equilibrium temperature of $60^\circ C$. Find the temperature of the furnace. Specific heat capacity of iron $= 470J \ kg {-1}^\circ C^{-1}$
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