A. mass does not cross boundaries of the system, though energy may do so
B. mass crosses the boundary but not the energy
C. neither mass nor energy crosses the boundaries of the system
D. both energy and mass cross the boundaries of the system
E. thermodynamic reactions take place
Related Mcqs:
- 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 - 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 - The unit of energy in S.I. units is________________?
A. watt
B. joule
C. joule/s
D. joule/m
E. joule m. - On weight basis, air contains following parts of oxygen_________________?
A. 21
B. 23
C. 25
D. 73
E. 79 - On volume basis, air contains following parts of oxygen _____________________?
A. 21
B. 23
C. 25
D. 77
E. 79 - 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 - If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle___________________?
A. more
B. less
C. equal
D. depends on other factors
E. none of the above - A perpetual motion machine is___________________?
A. a thermodynamic machine
B. a non-thermodynamic machine
C. a hypothetical machine
D. a hypothetical machine whose opera-tion would violate the laws of thermodynamics
E. an inefficient machine - The term N.T.P. stands for________________________?
A. nominal temperature and pressure
B. natural temperature and pressure
C. normal temperature and pressure
D. normal thermodynamic practice
E. normal thermodynamic pressure - Which of the following variables controls the physical properties of a perfect gas_________________?
A. pressure
B. temperature
C. volume
D. all of the above
E. atomic mass
