Question

State the energy change in a petrol engine of a running car

Answer 1

Hint: The energy in many of its forms may be used in the natural processes, It provides some services to the society such as heating, the refrigeration & the light, it performs the mechanical work to operate the machines.

Complete step-by-step solution:
The energy conversion or the energy transformation is the process of changing one form of energy to another,
The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.
The heat energy changes into the mechanical energy which moves the car and the chemical energy that stored in the fuel changes by burning into the thermal (the heat) energy in the car engine
The kinetic energy of expanding gas is converted to the linear piston movement that is converted to the rotary crankshaft movement; the rotary crankshaft movement is passed into the transmission assembly
The energy change in a petrol engine of a running car is from chemical energy to heat energy. There are other bi-products also formed in this conversion. Later heat energy is converted to kinetic energy. This kinetic energy helps the car to move.
A part of the electric energy changes into the sound energy in the car radio cassette, and a part of the electric energy changes into the heat energy in the electric heater of the car air conditioner.
When the battery is used to start the car, the energy is converted from electrical to mechanical energy to move the car.

Note: There is useful energy transfer in the car engine; you can see that the car engine transfers the chemical energy which is stored in the fuel into the kinetic energy of expanding gas via combustion in the engine and the wheels.