A gasoline engine has a power output of 155 kW(about 2.08 * 10^5 hp). its therma

Question

A gasoline engine has a power output of 155 kW(about 2.08 * 10^5 hp).  its thermal efficiency is 25.0%. a) How much heat must be supplied to the engine per second?
    (Answer is in J/s)

b) How much heat is discarded by the engine per second?
    (Answer in J/s)
A gasoline engine has a power output of 155 kW(about 2.08 * 10^5 hp).  its thermal efficiency is 25.0%. a) How much heat must be supplied to the engine per second?
    (Answer is in J/s)

b) How much heat is discarded by the engine per second?
    (Answer in J/s)

Explanation / Answer

a) How much heat must be supplied to the engine per second?

155 kw/.25 =620 Kw mean 620*10^3 J/s

b) How much heat is discarded by the engine per second?

620-155=465 Kw =465*10^3 J/s

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