Motion of System of Particles and Rigid Body, Magnetic Effects of Current and Magnetism, Electromagnetic Induction and Alternating Currents. Please consider supporting us by disabling your ad blocker on YouPhysics. Due to constant volume, there is no work done by the system. We will use the so-called Clausius convention to state the First Law of Thermodynamics. (i) During sudden compression,the process is adiabatic, Therefore, P2 = P1(V1/ V2 )γ= 1(2)1.4= 2.636 atmospheres, (ii) V1= V (say); V2= V/2, We have the relation, T1(V1 )γ-1= T2(V2 )γ-1, T2 = T1[2]1.4-1= 300[2]0.4 =395.9K= 122.9°C. When work is done on the working substance, there is rise in temperature because the external work done on the working substance increases its internal energy. Taking T1 and T2 as the temperature at the points A and B respectively and considering one gram molecule of the gas. The container is covered with an adiabatic wall. ( Log Out / Processes that occur very quickly and for which the system does not have time to exchange heat with its surroundings can also be considered to be adiabatic. Introduction to work done in adiabatic process: During an adiabatic process, the working substance is perfectly insulated from the surroundings. Assertion : In adiabatic process change in internal energy is equal to work done on gas. It can neither give heat nor take heat from the surroundings. Change ), You are commenting using your Twitter account. Introduction to work done in adiabatic process: During an adiabatic process, the working substance is perfectly insulated from the surroundings. Process b-c = isobaric process (constant pressure). (a) Both A and R are true and R is the correct explanation of A, (b) Both A and R are true but R is not correct explanation of A, Correct option (a) Both A and R are true and R is the correct explanation of A, In adiabatic process, no heat transfer takes place between gas and surrounding. Assertion : In an adiabatic process, change in internal energy of a gas is equal to work done on or by the gas in the process. A quantity of air at 27°C and atmospheric pressure is suddenly compressed to half its original volume. The case of an irreversible adiabatic transformation will be treated in the Joule expansion page. yes it can be zero.. if the work done on the seystem under consideration is zero. Assertion : The specific heat of a gas in an adiabatic process is zero and in an isothermal process is infinite. 2.