Question

My driveway is 60 feet long and 10 feet wide. My driveway is coated in ice to an average
depth of 1.2 inches. The current temperature is -5 ºC. How much ethanol (g) would I need to throw on
the driveway to have an ice free driveway?

Answer 1

point (ATA) Depression in freezing AT = ikim I= vant hoff factor (= 1 for non-electro lyte) - ethand is non-electrolyte kg = mola depression freezing point Constant me molality of Sante Here throw freezing logic behind this is ethanol, which will reduce its point to -5°C & ice will Volume 1 1.2 inch D Jofeet 60 feet loft = 304.8 cm o 6oft = 1828.8 cm 1.2 inch = 3.048 cm Volume = 304.8 x 1828. 8x3.048 = 1700 x 10 cm? #learnthesmarterway

Assume density = Iglam² mass = 1700 x 103 x ln auß - s 1700 x109 in kg - 1400 kq kg for water = 1.86 oc/m 5 = 1, 1.86 °C/m x ma m = - 5 1.86 2.68821 m = molality = no. of moles of saute mans d 2.6882 = n 1700 kg In = 4 569.9 medle molar mass of Gt, OH = 46 g/mol mass = 4569.9 more x 46 g/mol = 210215.4 9 #learnthesmarterway