Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant________________?

Related Mcqs:

1. 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

2. Change in enthalpy of a system is the heat supplied at___________________?

   A. constant pressure
   B. constant temperature
   C. constant volume
   D. constant entropy
   E. N.T.P. condition

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 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

6. 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

7. 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

8. 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

9. In order that a cycle be reversible, following must be satisfied ________________?

   A. free expansion or friction resisted expansion/compression process should not be encountered
   B. when heat is being absorbed, temperature of hot source and working sub¬stance should be same
   C. when beat is being rejected, temperature of cold source and working sub-stance should be same
   D. all of the above
   E. none of the above

10. Which of the following cycles is not a reversible cycle_____________________?

    A. Carnot
    B. Ericsson
    C. Stirling
    D. Joule
    E. none of the above