A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?

Related Mcqs:

1. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to__________________?

   A. + v
   B. – ve
   C. zero
   D. pressure x volume
   E. any where between zero and infinity

2. Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?

   A. pressure
   B. temperature
   C. volume
   D. internal energy
   E. entropy

3. In an isothermal process, the internal energy of gas molecules________________?

   A. increases
   B. decreases
   C. remains constant
   D. may increase/decrease depending on the properties of gas
   E. shows unpredictable behaviour

4. The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?

   A. E/3
   B. E/2
   C. 3E/4
   D. 2E/3
   E. 5E/4

5. Which law states that the internal energy of a gas is a function of temperature__________________?

   A. Charles’ law
   B. Joule’s law
   C. Regnault’s law
   D. Boyle’s law
   E. there is no such law

6. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?

   A. zero
   B. minimum
   D. maximum
   D. infinity
   E. there is no such criterion

7. Compressed air coming out from a punctured football___________________?

   A. becomes hotter
   B. becomes cooler1
   C. remains at the same temperature
   D. may become hotter or cooler depend-ing upon the humidity of the surround¬ing air
   E. attains atmospheric temperature

8. Work done in a free expansion process is___________________?

   A. + ve
   B. -ve
   C. zero
   D. maximum
   E. minimum

9. In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about_______________?

   A. 100 xlOO5 joules
   B. lxlO5 joules
   C. 10 xlO5 joules
   D. 10 xlO5 kilo joules
   E. 10xl04kiojoules

10. Work done in an adiabatic process between a given pair of end states depends on__________________?

    A. the end states only
    B. particular adiabatic process
    C. the value of index n
    D. the value of heattransferred
    E. mass of the system