A gas expands by a volume `DeltaV` against a constant pressure P. What is the work done by the system?

Explanation

To solve the problem of calculating the work done by a gas that expands by a volume \(\Delta V\) against a constant pressure \(P\), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Work Done**:
- Work done by a gas during expansion can be defined as the product of pressure and the change in volume. In thermodynamics, this is given by the formula:
\[
W = P \Delta V
...