A system undergoes an adiabatic process in which its internal energy increases by 20 J. Which statement is correct? (a) 20 J of heat added to the system, no work is done on or by the system. (b) 20 J of heat removed from the system, no work is done on or by the system. (c) 40 J of heat added to the system, 20 J of work done by the system. (d) no heat added to or removed from the system, 20 J of work done on the system. (e) no heat added to or removed from the system, 20 J of work done by the system.

Which is possible: converting (i) 100 J of work entirely into100 J of heat, (ii) 100 J of heat entirely into 100 J of work?(a) Only (i) is possible.(b) Only (ii) is possible.(c) Both (i) and (ii) are possible.(d) Neither (i) nor (ii) is possible

The engine of a large ship does 1.90 ✕ 108 J of work with an efficiency of 4.05% (a) How much heat transfer (in J) occurs to the environment?   (b) How many barrels of fuel are consumed, if each barrel produces 6.00 ✕ 109 J of heat transfer when burned?

(a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in the heat source to get 1000 Js of work? (b) When an ideal gas with Cp=5 cal/(mol·K) is compressed to 25°C, and 10°C through an adiabatic and reversible process, what is the final temperature of the gas? (c) In an ideal gas turbine power device, the pressure ratio is 6, the temperature entering the compressor is 27°C, and the maximum allowable temperature of the turbine is 816°C. What is the efficiency of this power device when it is carried out in reversible operation? However, the specific ratio is 1.4.