1. Calculate the amount of heat supplied to carnot cycle working between 368K and 268K, if the maximum work obtained is 890 joules.
2. A carnot engin eworking between 373K and 273K takes up 840 joules from the high temperature reservoir. Calculate the work done , the heat rejected and the efficiency of the heat engine.
3. Calculate th efficiency of a steam engine which operates between 373K and 573K. What is the minimum heat which must be withdrawn from the reservoir to obtain 171.52 joule of work ?
4. Two steam engines , one red and one black , take steams at 277ᵒC, while red engine rejects it at 27ᵒC , the black one reject it at 47ᵒC. compare the efficiencies of the engines.
5. Calculate the efficiencies of a carnot engine working between 200K and 1000K.
6. Heat supplied to a carnot engine is 453.6 kcal. How much useful work can be done by the engine which work between 0ᵒC and 100ᵒC ?
7. A carnot engine converts one sixth of heat input into work . When the temperature of the sink is lowered to 335K, its efficiency is doubled. Calculate the temperature of source and the sink.
8. If the efficiency of a carnot engine is the same (i) between 100 K and 400 K and (ii) between T K and 800 K, calculate the temperature T of the sink.
9. Calculate the maximum efficiency of a steam engine operating between 110ᵒC and 250ᵒC. What would be the efficiency of engine if the boiler temperature is raised to 140ᵒC, the temperature of the sink remaining same?
10. What per cent T₁ and T₂ for a heat engine whose efficiency is 10% ?
InoOP Chem 
