Question

The $$PT$$  diagram for an ideal gas is shown in the figure, where $$AC$$  is an adiabatic process, find the corresponding $$PV$$ diagram.
Thermodynamics mcq question image

A. Thermodynamics mcq option image
B. Thermodynamics mcq option image  
C. Thermodynamics mcq option image
D. Thermodynamics mcq option image
Answer :   Thermodynamics mcq option image
Solution :
If we study the $$P - T$$  graph we find $$AB$$  to be a isothermal process, $$AC$$  is adiabatic process given. Also for an expansion process, the slope of adiabatic curve is more (or we can say that the area under the $$P - V$$  graph for isothermal process is more than adiabatic process for same increase in volume).
Only graph (B) fits the above criteria.

Releted MCQ Question on
Heat and Thermodynamics >> Thermodynamics

Releted Question 1

An ideal monatomic gas is taken round the cycle $$ABCDA$$   as shown in the $$P - V$$  diagram (see Fig.). The work done during the cycle is
Thermodynamics mcq question image

A. $$PV$$
B. $$2PV$$
C. $$\frac{1}{2}PV$$
D. zero
Releted Question 2

If one mole of a monatomic gas $$\left( {\gamma = \frac{5}{3}} \right)$$  is mixed with one mole of a diatomic gas $$\left( {\gamma = \frac{7}{5}} \right)$$  the value of $$\gamma $$ for mixture is

A. 1.40
B. 1.50
C. 1.53
D. 3.07
Releted Question 3

A closed compartment containing gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is

A. same everywhere
B. lower in the front side
C. lower in the rear side
D. lower in the upper side
Releted Question 4

A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature $$T.$$ Neglecting all vibrational modes, the total internal energy of the system is

A. $$4\, RT$$
B. $$15\, RT$$
C. $$9\, RT$$
D. $$11\, RT$$

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