An aluminum cube of mass 44.25 g, at 22.3°c, is immersed in a styrofoam cup filled with ln2 at -195.8° c. after 120 seconds (sec), 34.50 g of ln2 evaporates due to heat transferred from the cube. calculate lv of ln2 (in units of calories and grams) and the rate r (calories/second) at which heat from the cube evaporates ln2. (note that the 34.50 g evaporated is due solely to the immersion of the cube, and not by heat transferring into the cup from the room.) use the accepted value of cal (for this temperature range) when calculating lv. use your calculated value of lv when calculating the rate r. show formulas and calculations.