Question

14. Liquid la is dissolved in liquid CH A What forces are broken? London dispersion forte London dispersion forte B. What forces are formed? 15. 15.5 g of liquid methanol (CH3OH) at 235.6 " was cooled until it reaches 63.3 "C. How much energy in Joules) was released during this process? boiling point = 64.7 °C, AH, = 31194.3J/g, AH+ = 99.1 J/g. Cliquid = 2.48/18°C), Cgas = 1.631/(g°C)

can someone explain number 15? thanks

Answer 1

Soln Mass of methanal = 15-59 thanala Mars - Ela Moм 15.58 0:485 mol 32818 NOV, Methand (g) (235.6°c (has St State) Methanal (8) (64.700) Head seeleoseoi = my goste 15.56x1463. I * (64.7– J 235.6% .:12= -403267 NOWO, Methanalg) eliese, Mellanol les (6407°C) Chang (64.7°c) Heat released (22)-mg OH. =-15.5jx 31194.35g % 5-483.52kJ Now, Methanal (0) 64.7C, - Methanal (e) 63.3°C that released (2) megat = 15:5gx 2.46 IY 16343-64.736 .-53-816 I esc ? 23 - -0.053.82 KJ Now Total heal selcase 18 ) = ,++1 2-4.32 KJ-483-52KJ-0.05.2kT 18. =-487-894 HJ]