The density of PETE is 1.38 g/cm3.
The volume of the solid is
56.5 ml - 25 ml = 31.5 ml
The mass of the solid = 25g
So the density is Mass/ Volume
25/ 31.5 = 0.79 g/ml
Since the solid has a lower density (0.79 g/ml) than the density of water (1g/ml) it will float on water
I think the answer is 233.748 calories
Calories heat added = Mass of glass times temp. increase times specific heat of glass
calories (small calories) = l.0 g x 20 degrees x .16 calories/gm/degree C = 3.2 calories
