35 POINTS -- REAL ANSWERS (please) For each of your three trials state the following:

• heat needed to melt the ice (q) (I got 18* for all)
• enthalpy of fusion (I'm not sure how to find the mass of the ice melted)
• percent error from the accepted enthalpy of fusion of water of 334 J/g (I don't understand this, we never went over this)

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.