A system changes from the state (P1, V1) to (P2, V2) as shown in the figure. What is the work done by the system ?
(1) 7.5 × 105 joule
(2) 7.5 × 105 erg
(3) 12 × 105 joule
(4) 6 × 105 joule
Carbon monoxide is carried around a closed cycle abc in which bc is an isothermal process as shown in the figure. The gas absorbs 7000 J of heat as its temperature increases from 300 K to 1000 K in going from a to b. The quantity of heat rejected by the gas during the process ca is -
(1) 4200 J
(2) 5000 J
(3) 9000 J
(4) 9800 J
When a system is taken from state i to a state f along path iaf, Q = 50 J and W = 20 J. Along path ibf, Q = 35 J. If W = –13 J for the curved return path f i, Q for this path is
(1) 33 J
(2) 23 J
(3) – 7 J
(4) – 43 J
An ideal gas is taken from point A to point B, as shown in the P-V diagram. The work done in the process is:
1.
2.
3.
4.
Consider a process shown in the figure. During this process the work done by the system -
(1) Continuously increases
(2) Continuously decreases
(3) First increases, then decreases
(4) First decreases, then increases
Six moles of an ideal gas perform a cycle shown in figure. If the temperature are TA = 600 K, TB = 800 K, TC = 2200 K and TD = 1200 K, the work done per cycle is -
(1) 20 kJ
(2) 30 kJ
(3) 40 kJ
(4) 60 kJ
In the following figure, four curves A, B, C and D are shown. The curves are
(1) Isothermal for A and D while adiabatic for B and C
(2) Adiabatic for A and C while isothermal for B and D
(3) Isothermal for A and B while adiabatic for C and D
(4) Isothermal for A and C while adiabatic for B and D
P-V diagram of a cyclic process ABCA is as shown in figure. Choose the correct statement
(1) = negative
(2) = positive
(3) = negative
(4) All of these
In the following P-V diagram two adiabatics cut two isothermals at temperatures T1 and T2 (fig.). The value of will be
(1)
(2)
(3)
(4) VbVc
An ideal gas with adiabatic exponent undergoes a process in which work done by the gas is same as increase in internal energy of the gas. The molar heat capacity of gas for the process is –
1.
2.
3.
4.