The enthalpy change for the process
`C("graphite") rarr C(g)`is called

Options

A. Heat of vaporisation
B. Heat fo sublimation
C. Heat of allotropic change
D. Heat of atomisation

Explanation

To determine the enthalpy change for the process \( C(\text{graphite}) \rightarrow C(g) \), we can follow these steps:

### Step 1: Identify the Process
The process involves converting solid carbon in the form of graphite to gaseous carbon.

### Step 2: Understand the Type of Change
This transformation is a phase change from solid to gas. In thermodynamics, this type of phase change is known as sublimation, where a solid turns directly into a gas without passing through the liquid phase.

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