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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

The molar specific heat of a gas at constant volume is 12307.69 J kg-1 K-1. If the ratio of the two specific heats is 1.65, calculate the difference between the two molar specific heats of gas.

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प्रश्न

The molar specific heat of a gas at constant volume is 12307.69 J kg-1 K-1. If the ratio of the two specific heats is 1.65, calculate the difference between the two molar specific heats of gas. 

पर्याय

  • 7999 J kg-1 K-1

  • 7245 J kg-1 K-1

  • 6890 J kg-1 K-1

  • 4067 J kg-1 K-1 

MCQ
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उत्तर

7999 J kg-1 K-1 

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पाठ 3: Kinetic Theory of gases and Radiation - MCQ’s

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एससीईआरटी महाराष्ट्र Physics [English] 12 Standard HSC
पाठ 3 Kinetic Theory of gases and Radiation
MCQ’s | Q 6

संबंधित प्रश्‍न

In an experiment on the specific heat of a metal, a 0.20 kg block of the metal at 150 °C is dropped in a copper calorimeter (of water equivalent 0.025 kg) containing 150 cm3 of water at 27 °C. The final temperature is 40 °C. Compute the specific heat of the metal. If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for the specific heat of the metal?


The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.


You have a choice of three metals A, B, and C, of specific heat capacities 900 Jkg-1 °C-1, 380 Jkg-1 °C-1 and 460 Jkg-1 °C-1 respectively, to make a calorimeter. Which material will you select? Justify your answer.


A copper vessel of mass 100 g contains 150 g of water at 50°C. How much ice is needed to cool it to 5°C?

Given: Specific heat capacity of copper = 0.4 Jg-1 °C-1

The Specific heat capacity of water = 4.2 Jg-1 °C-1

The Specific latent heat of fusion ice = 336 Jg-1


Heat supplied to a solid change it into liquid. What is this change in the phase called?


Name the S.I. unit of heat.


Name a liquid which has the highest specific heat capacity.


Give one example where high specific heat capacity of water is used as cooling purposes?


Give one example where high specific heat capacity of water is used 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 this final temperature. The specific heat capacity of copper is 0.39 J g-1K-1 and that of water is 4.2 J g-1K-1. State the assumption used.


Name two green house gases ?


What impact will global warming have on the health of the affected population?


How will you prove experimentally that different substances have different specific heat capacities?


Name and state the principle used to measure the specific heat capacity of a substance.


Give one example where high specific heat capacity of water is used as cooling.


Define specific heat. Is it same as heat capacity?

What is the value of specific heat of water?

The substances like water which have ........... Heat capacity warm up more slowly than substances like iron which have .......... heat capacity.


650 J of heat is required to raise the temp. of 0.25 kg of lead from 15°C to 35°C. Calculate the Sp. heat capacity of lead.


Specific heat capacity of a substance A is 3.8 J g-1 K-1 and of substance B is 0.4 J g-1 k-1. Which substance is a good conductor of heat? How did you arrive at your conclusion?


Water boils at 120 °C in a pressure cooker. Explain the reason.


Explain, why water is considered as best liquid for quenching thirst?


Some heat is provided to a body to raise its temperature by 25°C. What will be the corresponding rise in temperature of the body as shown on the Kelvin scale?


The temperature of a lead piece of mass 400 g rises from 20°C to 50°C when 1560 J of heat is supplied to it. Calculate: Heat capacity of lead piece.


Write a short note.

Specific heat capacity


Read the passage and answer the questions based on it.

If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy. The change in temperature continues till the temperatures of both objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat-resistant box then no energy can flow from inside the box or come into the box. In this situation, we get the following principle.
Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the ‘Principle of heat exchange’.

  1. Where does heat transfer take place?
  2. In such a situation which principle of heat do you perceive?
  3. How can this principle be explained in short?
  4. Which property of the substance is measured using this principle?

Numerical Problem.

What could be the final temperature of a mixture of 100 g of water at 90 °C and 600g of water at 20°C.


We would like to make a vessel whose volume does not change with temperature (take a hint from the problem above). We can use brass and iron `(β_(vbrass) = (6 xx 10^(–5))/K and β_(viron) = (3.55 xx 10^(–5))/K)` to create a volume of 100 cc. How do you think you can achieve this.


A geyser heats water flowing at a rate of 2.0 kg per minute from 30°C to 70°C. If the geyser operates on a gas burner, the rate of combustion of fuel will be ______ g min-1.

[Heat of combustion = 8 × 103 Jg-1 Specific heat of water = 4.2 Jg-1°C-1]


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