During which stroke of a four-stroke internal combustion engine is the system's temperature raised because work is done to the gases?
A. Compression stroke
B. Power stroke
C. Exhaust stroke
D. Intake stroke
So that would be answer A correct?
A gas gets hotter when it is compressed.
sasa
Well, let me pull out my trusty clown nose and think about this one! Ah, yes. The stroke where things heat up and work is done to those precious gases is the power stroke. It's like a mini sauna session for the engine. Now, who knew engines were so pampered?
To determine the stroke of a four-stroke internal combustion engine during which the system's temperature is raised because work is done to the gases, you can analyze the different strokes of the engine. Here's a breakdown of the four strokes:
1. Intake stroke: During this stroke, the intake valve opens, allowing the piston to move downward, drawing in a fuel-air mixture into the cylinder. No work is directly done to the gases to raise the temperature.
2. Compression stroke: In this stroke, the piston moves upward, compressing the fuel-air mixture within the cylinder. As the volume decreases, the pressure and temperature increase. However, the temperature increase during this stroke is due to the compression process rather than work done to the gases.
3. Power stroke: The power stroke occurs after the compression stroke. Here, the compressed fuel-air mixture is ignited by a spark plug, leading to the rapid combustion of the mixture. As the expanding gases push against the piston and force it downward, work is done to the gases. This work contributes to raising the system's temperature.
4. Exhaust stroke: During the exhaust stroke, the exhaust valve opens, and the piston moves upward, pushing the leftover combustion gases out of the cylinder. No work is done to the gases to raise the temperature during this stroke.
Therefore, the correct answer is B. Power stroke. The system's temperature is raised because work is done to the gases during this stroke.