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

Related Mcqs:

1. Change in enthalpy 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

2. 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___________________?

   A. 300 Nm
   B. 300,000 Nm
   C. 30 Nm
   D. 3000 Nm
   E. 30,000 Nm

3. If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?

   A. temperature
   B. enthalpy
   C. internal energy
   D. entropy
   E. all of the above

4. For reversible adiabatic process, change in entropy is_________________?

   A. maximum
   B. minimum
   C. zero
   D. unpredictable
   E. negative.

5. 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

6. In a Carnot cycle, heat is transferred at_______________________?

   A. constant pressure
   B. constant volume
   C. constant temperature
   D. constant enthaply
   E. any one of the above

7. 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

8. 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

9. For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?

   A. any gas
   B. saturated steam
   C. water
   D. perfect gas
   E. superheated steam

10. 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