Why internal energy is a state function but work is not ?

Explanation

To understand why internal energy is a state function while work is not, we can break down the concepts step by step.

### Step-by-Step Solution:

1. **Definition of State Function**:
- A state function is a property of a system that depends only on the current state of the system, regardless of how it arrived at that state. Examples include internal energy (U), enthalpy (H), temperature (T), and pressure (P).

2. **Internal Energy as a State Function**:
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