Carnot cycle efficiency is maximum when______________?

Carnot cycle efficiency is maximum when______________?

A. initial temperature is 0°K
B. final temperature is 0°K
C. difference between initial and final temperature is 0°K
D. final temperature is 0°C
E. initial temperature is minimum possible

Isochoric process is one in which___________________?

Isochoric process is one in which___________________?

A. free expansion takes place
B. very little mechanical work is done by the system
C. no mechanical work is done by the system
D. all parameters remain constant
E. mass and energy transfer do not take place