In what way internal energy is different from enthalpy? Explain both the terms with suitable examples.

Explanation

To differentiate between internal energy and enthalpy, we will define both terms and provide suitable examples for better understanding.

### Step 1: Define Internal Energy
Internal energy (U) is the total energy contained within a system. It includes all forms of energy associated with the microscopic components of the system, such as kinetic energy (due to molecular motion), potential energy (due to molecular interactions), and other forms like vibrational, rotational, and translational energy.

**Example of Internal Energy:**
Consider a gas in a closed container. The internal energy of this gas is the sum of the kinetic energy of the gas molecules moving randomly and the potential energy arising from the interactions between these molecules.

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