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A steam engine delivers 5.4 xx 10^8 J of...

A steam engine delivers `5.4 xx 10^8` J of work per minute and services `3.6 xx 10^9` 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

Efficiency `eta="Work done by the engine per minute"/"Heat supplied from the boiler"xx100%`
`=W/Q_1xx100%`
`=(5.4xx10^8)/(3.6xx10^9)xx100%`
=0.15 x 100%
=15%
Now `Q_1=W+Q_2`
`therefore Q_2=Q_1-W`
`=36xx10^8-5.4xx10^8`
`=30.6xx10^8`
`=3.06xx10^9`
`=3.1xx10^9` J/min
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