If a piston moves downward in a cylinder,what happens to the volume and pressure of the gas in the cylinder? The temperature remains constant.
What do you think happens? Visualize what is going on.
When a piston moves downward in a cylinder, the volume and pressure of the gas in the cylinder will change. The relationship between volume, pressure, and temperature of a gas is described by the gas laws, most notably Boyle's Law and Charles's Law.
Boyle's Law states that for a fixed amount of gas at a constant temperature, the pressure and volume of the gas are inversely proportional. This means that as the volume of the gas increases, the pressure decreases, and vice versa. So, when the piston moves downward, the volume of the gas increases, resulting in a decrease in pressure.
However, it's important to note that the temperature of the gas remains constant in this scenario. If the temperature were to change, it would follow Charles's Law, which states that for a fixed amount of gas at a constant pressure, the volume and temperature of the gas are directly proportional.
To summarize, when a piston moves downward in a cylinder, the volume of the gas increases, resulting in a decrease in pressure. The temperature remains constant.