1. Which of the following statements is correct? (a) The conservation of mass for an open system says that at steady-state condition, the mass crossing the boundary of the system is zero. (b) The thermal efficiency or coefficient of performance defined as output/input applies for for only Carnot engine/cycle. g) Carnot cyele uses 2 isothermal process and 2 adiabatic processes (d The efficiency of an ireversible engine is higher than that of a reversible engine working between the same two thermal reservoirs (e) The quality of heat energy is higher than work energy

2. Which of the following thermodynamic process does not have any irreversibility factor in the process? (a) A block sliding down a very rough surface with high friction (b) Slow expansion or compression of a gas with no heat transler (e) Unrestrained expansion or compression of a gas (d) Warming up of a cold soda can by heat transfer when kept in a warmer environment e)All the above processes have irreversibility factors