मराठी

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. What is the change in the temperature of the gas? - Physics

Advertisements
Advertisements

प्रश्न

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 the temperature of the gas?

एका वाक्यात उत्तर

उत्तर १

Zero. Since no work is being done by the gas during the expansion of the gas, the temperature of the gas will not change at all.

shaalaa.com

उत्तर २

The system being thermally insulated, there is no change in temperature (because of free expansion).

shaalaa.com
Heat, Internal Energy and Work
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 12: Thermodynamics - Exercises [पृष्ठ ३१६]

APPEARS IN

एनसीईआरटी Physics [English] Class 11
पाठ 12 Thermodynamics
Exercises | Q 6.3 | पृष्ठ ३१६

संबंधित प्रश्‍न

Explain why Two bodies at different temperatures T1 and T2, if brought in thermal contact, do not necessarily settle to the mean temperature (T1 + T2)/2.


Should the internal energy of a system necessarily increase if its temperature is increased?


The final volume of a system is equal to the initial volume in a certain process. Is the work done by the system necessarily zero? Is it necessarily nonzero?


Can work be done by a system without changing its volume?


Consider the following two statements.

(A) If heat is added to a system, its temperature must increase.

(B) If positive work is done by a system in a thermodynamic process, its volume must increase.


Consider two processes on a system as shown in figure.

The volumes in the initial states are the same in the two processes and the volumes in the final states are also the same. Let ∆W1 and ∆W2 be the work done by the system in the processes A and B respectively.


In a process on a system, the initial pressure and volume are equal to the final pressure and volume.

(a) The initial temperature must be equal to the final temperature.

(b) The initial internal energy must be equal to the final internal energy.

(c) The net heat given to the system in the process must be zero.

(d) The net work done by the system in the process must be zero.


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 

One gram of water (1 cm3) becomes 1671 cm3 of steam at a pressure of 1 atm. The latent heat of vaporization at this pressure is 2256 J/g. Calculate the external work and the increase in internal energy. 


A cylinder containing one gram molecule of the gas was compressed adiabatically until its temperature rose from 27°C to 97°C. Calculate the work done and heat produced in the gas (𝛾 = 1.5).


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×