Which of the following can not determine the state of a thermodynamic system 

(1) Pressure and volume

(2) Volume and temperature

(3) Temperature and pressure

(4) Any one of pressure, volume or temperature

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Which of the following is not a thermodynamics co-ordinate ?

(1) P

(2) T

(3) V

(4) R

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In a given process for an ideal gas, dW = 0 and dQ < 0. Then for the gas -

(1) The temperature will decrease

(2) The volume will increase

(3) The pressure will remain constant

(4) The temperature will increase

Concept Questions :-

First law of thermodynamics
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Which of the following statements is correct for any thermodynamic system ?

(1) The internal energy changes in all processes

(2) Internal energy and entropy are state functions

(3) The change in entropy can never be zero

(4) The work done in an adiabatic process is always zero

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In a thermodynamic process, pressure of a fixed mass of a gas is changed in such a manner that the gas molecules absorb 30 J of heat and 10 J of work is done by the gas. If the initial internal energy of the gas was 40 J, then the final internal energy will be -

(1) 30 J

(2) 20 J

(3) 60 J

(4) 40 J

Concept Questions :-

First law of thermodynamics
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First law of thermodynamics is a special case of 

(1) Newton's law

(2) Law of conservation of energy

(3) Charle's law

(4) Law of heat exchange

Concept Questions :-

First law of thermodynamics
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If the ratio of specific heat of a gas at constant pressure to that at constant volume is γ, the change in internal energy of a mass of gas, when the volume changes from V to 2V constant pressure p, is 

(1) R/(γ1)

(2) pV

(3) pV/(γ1)

(4) γpV/(γ1)

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If heat given to a system is 6 kcal and work done is 6 kJ. Then the change in internal energy is :

(1) 19.1 kJ

(2) 12.5 kJ

(3) 25 kJ

(4) Zero

Concept Questions :-

First law of thermodynamics
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A monoatomic gas of n-moles is heated from temperature T1 to T2 under two different conditions (i) at constant volume and (ii) at constant pressure. The change in internal energy of the gas is 

(1) More for (i)

(2) More for (ii)

(3) Same in both cases

(4) Independent of number of moles

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Can two isothermal curves cut each other

(1) Never

(2) Yes

(3) They will cut when temperature is 0°C

(4) Yes, when the pressure is critical pressure

Concept Questions :-

Types of processes
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