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

Concept Questions :-

Cyclic process
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A sample of ideal monoatomic gas is taken round the cycle CBAC as shown in the figure. The work done during the cycle is 

(1) Zero

(2) 3 PV

(3) 6 PV

(4) 9PV

Concept Questions :-

Work done by gas
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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

Concept Questions :-

First law of thermodynamics
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For one complete cycle of a thermodynamic process on a gas as shown in the P-V diagram, which of following is correct ?

(1) ΔEint=0,Q<0

(2) ΔEint=0,Q>0

(3) ΔEint>0,Q<0

(4) ΔEint<0,Q>​ 0

Concept Questions :-

Cyclic process
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An ideal gas is taken from point A to the point B, as shown in the P-V diagram. The work done in the process is -

(1) (PAPB)(VBVA)

(2) 12(PBPA)(VB+VA)

(3) 12(PBPA)(VBVA)

(4) 12(PB+PA)(VBVA)

Concept Questions :-

Work done by gas
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The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from AB C is 30J and 40J heat is given to the system. The change in internal energy between A and C is

(1) 10 J

(2) 70 J

(3) 84 J

(4) 134 J

Concept Questions :-

First law of thermodynamics
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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

Concept Questions :-

Work done by gas
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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

Concept Questions :-

Types of processes
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Which of the accompanying PV diagrams best represents an isothermal process ?

(1)

(2)

(3)

(4)

Concept Questions :-

Types of processes
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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

Concept Questions :-

Types of processes
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Difficulty Level: