To calculate the calorific value (CV) of a fuel sample of coal, we need to know the heat released by the combustion of the fuel. The CV is defined as the amount of heat released per unit mass of the fuel. We can use a calorimeter to measure the heat released by the combustion of the fuel.

Given:
- Mass of coal sample = 0.6 g
- Water equivalent of calorimeter = 2200 g
- Increase in temperature = 6.52°C

To calculate the CV of the coal sample, we can use the following formula:

CV = (heat released by the combustion of the coal) / (mass of coal sample)

The heat released by the combustion of the coal can be calculated using the following formula:

Heat released = (water equivalent of calorimeter) x (increase in temperature)

Substituting the given values, we get:

Heat released = (2200 g) x (6.52°C) = 14344 J

Now, substituting this value in the formula for CV, we get:

CV = (14344 J) / (0.6 g) = 23907 J/g

Therefore, the CV of the coal sample is 23907 J/g.