Can specific heat of a gas be negative?

Explanation

To determine whether the specific heat of a gas can be negative, let's analyze the concept step by step.

### Step 1: Understand the Definition of Specific Heat
Specific heat (s) is defined as the amount of heat (Q) required to change the temperature of a unit mass (m) of a substance by one degree Celsius (or one Kelvin). The formula for specific heat can be expressed as:

\[ s = \frac{Q}{m \Delta T} \]

where:
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