A heat engine takes up heat at 100K and liberates heat at 200K. Which of the following in an impossible amount of heat rejected by the engine if 1000J of heat is absorbed:

An ideal heat engine takes in heat at 1520K and rejects heat at 380K . What is the efficiency of that engine ?

An ideal engine takes in heat at 1000K .and rejects heat 300K . Calculate it's efficiency .

Heat engine rejects some heat to the sink. This heat

A carnot engine absorbs heat at 127^(@)C and rejects heat at 87^(@)C . The efficiency of engine is

Heat engine takes 300 cal of heat 500 K and rejects 150 cal of heat to sink. The temperature of sink is

A reversible heat engine A (based on carnot cycle) absorbs heat from a reservoir at 1000 K and rejects heat to a reservoir at T_(2) . A second reversible engine B absorbs, the same amount of heat as rejected by the engine A, from the reservoir at T_(2) and rejects energy to a reservoir at 360 K. If the efficiencies of engines A and B are the same then the temperautre T_(2) is

Two Carnot engines A and B operate in series such hat engine A absorbs heat at T_(1) and rejects heat to a sink at temperature T. Engine B absorbs half of the heat rejected by Engine A and rejects heat to the sink at T_(3) . When workdone in both the cases is equal, to value of T is :

An engine operates between temperatures 100K and 1000K. If the engine does 5000J of work per minute. How much heat is expelled by the engine?