# Calculating Work Done on a Gas Under Constant Pressure: 4.0L to 2.0L at 850 Pa

• joeyz123
In summary, the work done on a gas under constant pressure can be calculated using the equation W = PΔV, where P is the constant pressure and ΔV is the change in volume of the gas. The units for work done on a gas are joules (J) or newton-meters (N·m). The change in volume of a gas can be found by subtracting the initial volume from the final volume. In this case, it would be 2.0L - 4.0L = -2.0L. The pressure is constant in this scenario because it is stated as 850 Pa and does not change throughout the process. This equation can be used for all types of gases as long as
joeyz123

## Homework Statement

Question: The volume of an ideal gas is compressed from 4.0L to 2.0L under a constant pressure of 850 Pa. How much work is done on the gas?

## Homework Equations

W=-P(Change in volume)

## The Attempt at a Solution

I keep coming out with -1.7 which I know is incorrect.

1.Don't forget the unit of work.
2.Do you think that the work done on the gas is negative or could it be positive?

## 1. How do you calculate work done on a gas under constant pressure?

The work done on a gas under constant pressure can be calculated using the equation W = PΔV, where P is the constant pressure and ΔV is the change in volume of the gas.

## 2. What are the units for work done on a gas?

The units for work done on a gas are joules (J) or newton-meters (N·m).

## 3. How do you find the change in volume (ΔV) for a gas?

The change in volume of a gas can be found by subtracting the initial volume from the final volume. In this case, it would be 2.0L - 4.0L = -2.0L.

## 4. Why is the pressure constant in this scenario?

In this scenario, the pressure is constant because it is stated as 850 Pa and does not change throughout the process.

## 5. Can this equation be used for all types of gases?

Yes, this equation can be used for all types of gases as long as the pressure remains constant throughout the process.

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