Gasoline burns in the cylinder of an automobile engine. during the combustion reaction, the production of gas forces the piston to move, exerting 560j. also, the engine’s cooling system has to carry away 2.2kj as a result of the increased temperature of the coolant liquid. if the system is defined to be the gasoline and oxygen that react, what is the change in its internal energy?

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.