During which stroke of a four-stroke internal combustion engine is work done by the system of gases?
A.
Power stroke
B.
Intake stroke
C.
Compression stroke
D.
Exhaust stroke
It isn't C because work is done to and not by
Would it be power stroke because it uses the gases to propel?
The intake pulls fuel into the cylinder. The exhaust stroke lets the gases out. The compression stroke takes the gases from the intake stroke and compresses them. Then the power stroke propels the piston to the other end of the cylinder and pushes the connection rod which is connected to the drive shaft and that is connected to the wheels. Which one does work by the system to the car/truck/whatever?
Answer is A
It isnt C. I have already tried it. It would only be C If the question said work done to and not by. Like you said compression requires work, means work done to, not by
I actually just took the quiz for AP Chem on APEX and compression was wrong, maybe try what John says and choose power stroke
A is correct here, I'd bet my best pair of pants on it
The correct answer is A. Power stroke.
To determine the correct answer, we can first understand the four strokes of a four-stroke internal combustion engine: intake stroke, compression stroke, power stroke, and exhaust stroke.
During the intake stroke (B), the piston moves downward, creating a vacuum that allows the intake valve to open and fuel and air to enter the combustion chamber. This stroke is responsible for taking the fuel-air mixture into the cylinder.
During the compression stroke (C), the piston moves upward, compressing the fuel-air mixture, which increases its pressure and temperature. This stroke prepares the mixture for combustion but does not involve any work done by the system of gases.
During the power stroke (A), the compressed fuel-air mixture is ignited by the spark plug. The rapidly expanding gases push the piston downward, generating the power and driving force that moves the crankshaft. It is during this stroke that work is done by the system of gases, converting the energy released by the combustion into useful mechanical work.
Finally, during the exhaust stroke (D), the exhaust valve opens, and the piston moves upward, pushing the burnt gas out of the cylinder. This stroke expels the waste gases from the combustion process and prepares the cylinder for the next intake stroke.
In summary, work is done by the system of gases during the power stroke (A) of a four-stroke internal combustion engine.
That's what I would go with.
IT is A for Apex
Compression stroke
I just took the test on apex