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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Which of the following is correct, when the energy is transferred to a system from its environment?

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प्रश्न

Which of the following is correct, when the energy is transferred to a system from its environment?

पर्याय

  • System gains energy

  • System loses energy

  • System releases energy

  • the system does not exchange energy

MCQ
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उत्तर

System gains energy

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Thermodynamics - MCQ’s

संबंधित प्रश्‍न

Explain why Air pressure in a car tyre increases during driving.


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Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface?


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The outer surface of a cylinder containing a gas is rubbed vigorously by a polishing machine. The cylinder and its gas become warm. Is the energy transferred to the gas heat or work?


A closed bottle contains some liquid. the bottle is shaken vigorously for 5 minutes. It is found that the temperature of the liquid is increased. Is heat transferred to the liquid? Is work done on the liquid? Neglect expansion on heating.


When a tyre bursts, the air coming out is cooler than the surrounding air. Explain.


Refer to figure. Let ∆U1 and ∆U2 be the changes in internal energy of the system in the process A and B. Then _____________ .


An ideal gas goes from the state i to the state f as shown in figure. The work done by the gas during the process ______________ .


A gas is contained in a metallic cylinder fitted with a piston. The piston is suddenly moved in to compress the gas and is maintained at this position. As time passes the pressure of the gas in the cylinder ______________ .


Figure shows three paths through which a gas can be taken from the state A to the state B. Calculate the work done by the gas in each of the three paths.


A substance is taken through the process abc as shown in figure. If the internal energy of the substance increases by 5000 J and a heat of 2625 cal is given to the system, calculate the value of J.


What is the energy associated with the random, disordered motion of the molecules of a system called as?


What is the internal energy of the system, when the amount of heat Q is added to the system and the system does not do any work during the process?


When does a system lose energy to its surroundings and its internal energy decreases? 


Explain given cases related to energy transfer between the system and surrounding –

  1. energy transferred (Q) > 0
  2. energy transferred (Q) < 0
  3. energy transferred (Q) = 0 

derive the relation between the change in internal energy (∆U), work is done (W), and heat (Q). 


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Which of the following represents isothermal process?


Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following:

What is the change in internal energy of the gas?


In insulated systems, the amount of external work done by the gas is proportional to: 


A gas is compressed at a constant pressure of 50 N/m2 from a volume of 10 m3 to a volume of 4 m3. Energy of 100 J is then added to the gas by heating. Its internal energy is ______.


Explain the change in internal energy of a thermodynamic system (the gas) by heating it.


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