Question

Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. In an automobile engine, fuel is burned to convert ________energy into heat energy. The ________energy is then changed into ________energy. Identify the correct order of energy conversion in an automobile engine. A) heat → chemical → mechanical B) chemical → mechanical → heat C) mechanical → heat → chemical D) chemical → heat → mechanical

Answer 1

The correct Answer is : D) chemical → heat → mechanical

Answer 2

Answer: D (chemical  -> heat -> mechanical)

In automobile engines the petrol/diesel fuel enter in to the engine cylinder, due to spark at the end of the compression, fuel burnt increase the temperature and pressure, develops heat (chemical energy -> heat energy). This heat energy acts on a piston develops the work on the crankshaft ( Heat energy -> Mechanical energy).