Answer:
![\huge{\boxed{3.08 \: L}}](https://img.qammunity.org/2023/formulas/chemistry/college/at2i6ybivf8oljef3kui7qncdic7l8wt1a.png)
Step-by-step explanation:
The volume of the heated balloon can be found by using the Charles' law formula which is;
![\bold{(V_1)/(T_1) = (V_2)/(T_2)} \\](https://img.qammunity.org/2023/formulas/chemistry/college/hi23j47m8wpuvs8bc4td2u8c2dsx8kx000.png)
where
T1 is the initial temperature
T2 is the final temperature
V1 is the initial volume
V2 is the final volume
From the question
T1 = 323K
T2 = 398K
V1 = 2.5 L V2 = ?
![V_2 = (V_1 * T_2)/(T_1) \\](https://img.qammunity.org/2023/formulas/chemistry/college/v8xl2kjw1l21l2aw19jo2d0u3i055mc8l7.png)
![V_2 = (2.5 * 398)/(323) = (995)/(323) \\ = 3.0804](https://img.qammunity.org/2023/formulas/chemistry/college/a0nym4bv0c28v6snirknbj1bp6oxkwq9za.png)
We have the final answer as
3.08 L