If a carnot engine receives heat from a heat source and discharge 1000J to a heat sink at temperature of 27C in each cycle, calculate the heat received and the work performed by the engine in each cycle

Answer 1

You need to say what the heat source temperature is. Then the efficiency can be calculated

Answer 2

a carnot machine operates between a hot reservoir at 200 grade C and a cold reservoir at 20 grade C.
When operated as an engine it receives 1000 KJ/kg; find the work output.
Find the COP when operates as a refrigerator and a heat pump.