Uncategorized: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Uncategorized. Understanding the underlying formula is key to arriving at the correct answer below:

In an isothermal process, the temperature remains constant, so the change in internal energy is zero ($\Delta U = 0$). By the first law of thermodynamics, $\Delta Q = \Delta U + \Delta W = 0 + 150\text{ J} = 150\text{ J}$, meaning heat is added.