How much heat is absorbed aif this system expands against a constant external pressure of 1 atm and expansion is carried out from 2.5L to final volume of 12.5L reversibly?

Explanation

To solve the problem of how much heat is absorbed when the system expands against a constant external pressure, we can follow these steps:

### Step 1: Identify the initial and final volumes
- Initial volume (V1) = 2.5 L
- Final volume (V2) = 12.5 L

### Step 2: Calculate the change in volume (ΔV)
\[
...