What is the formula to calculate the pressure-volume work done by a gas?

The formula to calculate the pressure-volume work done by a gas is Work = P × ΔV. In this expression, P represents the pressure exerted by the gas, and ΔV signifies the change in volume. This formula is rooted in the principles of thermodynamics and describes how work can be done by or on a gas when it expands or contracts within a system.

When a gas expands, it pushes against the boundaries of its container, doing work on the surroundings. The work done is directly proportional to both the pressure of the gas and the amount by which the volume changes. This means that if either the pressure increases or the volume change is greater, the work done by the gas will also increase accordingly.

In scenarios involving gas compression, the formula still applies, but the sign of work might change depending on the context (work done on the gas vs. work done by the gas). Overall, understanding this formula is crucial for HVAC professionals when designing and analyzing systems that involve gas behavior and efficiency.