The latent heat of fusion of water is 334 j/g or 80 cal/g at 0 degrees celsius. a. what is the heat in joules required to melt 25 grams of ice? b. what is the heat in calories? (1 kcal=4184 j) c. what assumption did you make about the temperature?

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?