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Calorimetry Physics - Calorimetry

Jharkhand Board (JAC) - STD 12 Science - Physics (Jharkhand - English Medium). 37 questions in this chapter.

Question types

Calorimetry question types

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

37
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 1M.C.Q (1 Marks)1 Mark
The ratio of specific heat capacity to molar heat capacity of a body:
  • A
    Is a universal constant.
  • B
    Depends on the mass of the body.
  • ✓
    Depends on the molecular weight of the body.
  • D
    Is dimensionless.

Answer: C.

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Q 2M.C.Q (1 Marks)1 Mark
When a hot liquid is mixed with a cold liquid, the temperature of the mixture:
  • A
    First decreases then becomes constant.
  • B
    First increases then becomes constant.
  • C
    Continuously increases.
  • ✓
    Is undefined for some time and then becomes nearly constant.

Answer: D.

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Q 3M.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 4M.C.Q (1 Marks)1 Mark
Two bodies at different temperatures are mixed in a calorimeter. Which of the following quantities remains conserved?
  • A
    Sum of the temperatures of the two bodies.
  • B
    Total heat of the two bodies.
  • ✓
    Total internal energy of the two bodies.
  • D
    Internal energy of each body.

Answer: C.

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Q 5M.C.Q (1 Marks)1 Mark
The mechanical equivalent of heat:
  • A
    Has the same dimension as heat.
  • B
    Has the same dimension as work.
  • C
    Has the same dimension as energy.
  • ✓
    Is dimensionless.

Answer: D.

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Q 71 Marks Question1 Mark
A block of mass 100g slides on a rough horizontal surface. If the speed of the block decreases from $10ms^{-1}$ to $5ms^{-1}$, find the thermal energy developed in the process.
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Q 81 Marks Question1 Mark
Four 2cm × 2cm × 2cm cubes of ice are taken out from a refrigerator and are put in 200ml of a drink at 10°C.
  1. Find the temperature of the drink when thermal equilibrium is attained in it.
  2. If the ice cubes do not melt completely, find the amount melted. Assume that no heat is lost to the outside of the drink and that the container has negligible heat capacity. Density of ice $= 900kg-m^{-3}$, density of the drink $= 1000kg-m^{-3}$, specific heat capacity of the drink $= 4200Jkg^{-1}-K^{-1}$, latent heat of fusion of ice $= 3.4 × 10^5J-kg^{-1}$.
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Q 101 Marks Question1 Mark
A van of mass 1500kg travelling at a speed of $54kmh^{-1}$ 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 145 Marks Questions5 Marks
A piece of iron of mass 100 g is kept inside a furnace for a long time and then put in a calorimeter of water equivalent 10 g containing 240 g of water at $20^{\circ} \mathrm{C}$. The mixture attains and equilibrium temperature of $60^{\circ} \mathrm{C}$. Find the temperature of the furnace. Specific heat capacity of iron $=470 \mathrm{J\ kg}^{-10} \mathrm{C}^{-1}$.
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Q 155 Marks Questions5 Marks
The temperatures of equal masses of three different liquids A, B and C are 12°C, 19°C and 28°C respectively. The temperature when A and B are mixed is 16°C, and when B and C are mixed, it is 23°C. What will be the temperature when A and C are mixed?
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Q 165 Marks Questions5 Marks
An aluminium vessel of mass 0.5kg contains 0.2kg of water at $20^\circ C.$ A block of iron of mass 0.2kg 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 $910Jkg^{-1}-K^{-1}$, $470Jkg^{-1}-K^{-1}$ and $4200Jkg^{-1}-K^{-1}$ respectively.
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Q 18Case study (4 Marks)4 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 10kg 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°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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