how do i find the heat of fusion for a calorimeter lab?

Question

i melted acetamide in a test tube in a calorimeter and was told to determine the heat of fusion. i have the mass of acetamide as 15g. temperature melting initiated at 80.1 C mass of water as 183.4g the intial calorimeter water temperature at 19.3 C and the final water temperature at 25.1 C

i melted acetamide in a test tube in a calorimeter and was told to determine the heat of fusion. i have the mass of acetamide as 15g. temperature melting initiated at 80.1 C mass of water as 183.4g the intial calorimeter water temperature at 19.3 C and the final water temperature at 25.1 C. in the end it returned to solid form

Answer 1

You have a problem here. Melting is endothermic. It absorbs heat. For example, you have to heat ice to melt it.

The water temperature should have gone down as it is the heat source.

Your water temp. is going up. It is not possible, unless you have your data mixed up. Or perhaps, your acetamide was solidifying, and not melting