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

Subtopic:  Types of Processes |
 61%
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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

Subtopic:  Types of Processes |
 72%
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P-V diagram of a cyclic process ABCA is as shown in figure. Choose the correct statement

(1) ΔQAB = negative

(2) ΔUBC = positive

(3) ΔWCAB = negative

(4) All of these

Subtopic:  Cyclic Process |
 86%
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In the following P-V diagram two adiabatics cut two isothermals at temperatures T1 and T2 (fig.). The value of VaVd will be

(1) VbVc

(2) VcVb

(3) VdVa

(4) VbVc

Subtopic:  Types of Processes |
 73%
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An ideal gas with adiabatic exponent γ=1.5 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. C=4R

2. C=0

3. C=2R

4. C=R

Subtopic:  Types of Processes |
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The molar heat capacity for an ideal gas

1.  cannot be negative

2.  must be equal to either CV or CP

3.  must lie in the range CVCCP

4.  may have any value between - and +

Subtopic:  Molar Specific Heat |
 51%
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An ideal gas expands according to the law PV2 = const. The molar heat capacity C is : 

1. CV + R 

2. CV  R 

3. CV + 2R

4. CV  3R

Subtopic:  Molar Specific Heat |
 68%
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The molar heat capacity C for an ideal gas going through a given process is given by C = a/T , where 'a' is a constant. If  γ= CP/CV , the work done by one mole of gas during heating from T0 to η T0 through the given process will be:

1.  1a ln η

2.  a ln η- η-1γ-1 RT0

3.  a ln η-γ-A RT0

4.  none of these

Subtopic:  Molar Specific Heat |
 76%
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P-V diagram of a diatomic gas is straight line passing through origin. The molar heat capacity of the gas in the process will be

1. 4R

2. 2.5 R

3. 3R

4. 4R3

Subtopic:  Specific Heat |
 51%
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