Q. An open system is one in which (Solved)
1. heat & work cross the boundary of the system, but the mass of the working substance does not
2. mass of working substance crosses the boundary of the system but the heat & work do not
3. both the heat & work as well as mass of the working substance cross the boundary of the system
4. neither the heat & work nor the mass of the working substances cross the boundary of the system
- c. both the heat & work as well as mass of the working substance cross the boundary of the system