Heat is supplied to a system, but its internal energy does not increase. What is the process involved ?

Explanation

To solve the question regarding the process where heat is supplied to a system but its internal energy does not increase, we can follow these steps:

### Step 1: Understand Internal Energy
Internal energy is a property of a system that depends on its temperature. When heat is added to a system, it typically increases the internal energy, which in turn raises the temperature of the system.

**Hint:** Remember that internal energy is closely related to temperature changes in a system.

### Step 2: Identify the Condition
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