A 200 cm³ sample of water is heated from 25 K to 29.5 K by burning butanol. The mass of the lamp and butanol decreased from 16.4 g to 12.4 g. Calculate the mass of butanol burnt.

Here's the solution to the problem, broken down into parts.

The problem describes an experiment where 200 $\text{cm}^3$ of water is heated from 25 K to 29.5 K by burning butanol. The mass of the lamp and butanol decreased from 16.4 g to 12.4 g.

Part (i): Calculate Mass of butanol burnt

Step 1: Identify the initial and final masses of the lamp and butanol.
Initial mass = 16.4 g
Final mass = 12.4 g

Step 2: Calculate the mass of butanol burnt.

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