A heat engine takes in 300 K cal of heat from a reservoir at 627^(@)C and gives it to a sink at 27^(@)C. The work done by the engine is

A heat engine takes in 300 K cal of heat from a reservoir at 627^(@)C

1.	A heat engine takes in 300 K cal of heat from a reservoir at 627^(@)C and gives it to a sink at 27^(@)C. The work done by the engine is
Answer» `4.2xx10^(6)J` `16.8xx10^(6)J` `8.4xx10^(6)J` `2.1xx10^(6)J` Solution :`Q=3000xx10^(3)` cal `=3xx10^(6)xx4.2J=12.6xx10^6J` `W=Q(1-(T_(2))/(T_(1)))` `=12.6xx10^(6)(1-(300)/(900))=12.6xx10^(6)XX(2)/(3)` `=8.4xx10^(6)J`.

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A heat engine takes in 300 K cal of heat from a reservoir at 627^(@)C and gives it to a sink at 27^(@)C. The work done by the engine is

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