Efficiency of heat engine

The maxium possible efficiency of a heat engine is

Assertion: Efficiency of a heat engine can't be greater than efficiency of Carnot engine. Reason: Effieciency of any engine is never 100%

Efficiency of a heat engine working between a given source and sink is 0.5 . Coefficient of performance of the refrigerator working between the same source and the sink will be

The efficiency of a heat engine is defined as the ratio of the mechanical work done by the engine in one cycle to the heat absorbed from the high temperature source . eta = (W)/(Q_(1)) = (Q_(1) - Q_(2))/(Q_(1)) Cornot devised an ideal engine which is based on a reversible cycle of four operations in succession: isothermal expansion , adiabatic expansion. isothermal compression and adiabatic compression. For carnot cycle (Q_(1))/(T_(1)) = (Q_(2))/(T_(2)) . Thus eta = (Q_(1) - Q_(2))/(Q_(1)) = (T_(1) - T_(2))/(T_(1)) According to carnot theorem "No irreversible engine can have efficiency greater than carnot reversible engine working between same hot and cold reservoirs". Efficiency of a carnot's cycle change from (1)/(6) to (1)/(3) when source temperature is raised by 100K . The temperature of the sink is-

Define thermal efficiency of a heat engine.

What percentage T_(1) is of T_(2) for a 10% efficiency of a heat engine?

The heat absorbed by a carnot engine from the source in each cycle is 500 J and the efficiency of the engine is 20%. Calculate the work done in each cycle ?

A Carnot engine works between 600K and 300K. The efficiency of the engine is

A reversible engine takes heat from a reservoir at 527^(@)C and gives out to the sink at 127^(@)C. The engine is required to perform useful mechanical work at the rate of 750 watt. The efficiency of the engine is

A carnot engine is operated between two reserviors at temperatures of 500 K and 400 K. The engine receives 840 Joules of heat from the source in each cycle. Calculate (a) the amount of heat rejected to sink in each cycle (b) the efficiency of the engine, and (c) the work done in each cycle.