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A steam engine delivers 5.4xx10^(8)J of ...

A steam engine delivers `5.4xx10^(8)J` of work per minute and absorbs `3.6xx10^(9)J` of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

Text Solution

Verified by Experts

Output, i.e., useful work done per min.`=5.4xx10^(8)J`
Input, i.e, heat absorbed per min. `=3.6xx10^(9)J`
Efficiency `=(output)/(i nput)= (5.4xx10^(8))/(3.6xx10^(9))= 0.15= 0.15xx100%= 15%`
Heat energy wasted// minute = Heat absorbed// minute- useful work done// minute
`= 3.6xx10^(9)-5.5xx10^(8)= 10^(9)(3.6-0.54)= 3.06xx10^(9)J`
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