Calculate the latent heat of vaporization Lv of LN2 by following the steps below: a. Find the formula for Lv in the lab manual and write it on this sheet. b. Substitute the numbers from the exercise into the formula and perform the calculations on this sheet. Use the accepted value of cAl for this temperature range. c. Provide the answer (Lv) in units of calories and grams, with two digits after the decimal point.