What is the volume at 25 ºC and at 1 atm of pressure of each fuel needed to boil (to completion) 1.50 kg of ice initially at −15.0 ºC? Assume all are complete combustion reactions (in excess oxygen) at 50% efficiency under constant pressure and all fuels behave as ideal gases. ΔHvap(water) = 40.656 kJmol−1 (plus all other constants in 37). a.) Methane (CH4)

b.) Methanol (CH3OH)

c.) Ethane (C2H6)

d.) Acetylene (C2H2)

e.) Ethylene (C2H4)

f. ) Propane (C3H8)

Answers:

a. 278 L b. 349 L c. 156 L d. 178 L e. 168 L f. 109 L