Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________?

A. its heating value
B. kinetic energy of molecules
C. repulsion of molecules
D. attraction of molecules
E. surface tension of molecules

A. at sea level
B. at the center of the earth
C. when molecular momentum of the system becomes zero
D. under vacuum conditions
E. at a temperature of – 273 °K

A. newton
B. pascal
C. erg
D. watt
E. joule

A. mass does not cross boundaries of the system, though energy may do so
B. neither mass nor energy crosses the boundaries of the system
C. both energy and mass cross the boundaries of the system
D. mass crosses the boundary but not the energy
E. thermodynamic reactions do not occur

A. Boyle’s law
B. Charles’law
C. Gay-Lussac law
D. all of the above
E. Joule’s law

A. greater of the partial pressures of all
B. average of the partial pressures of all
C. sum of the partial pressures of all
D. sum of the partial pressures of all divided by average molecular weight
E. atmospheric pressure