Which of the following pairs lists phase changes that both give off energy? a) Freezing and condensation
b) Deposition and vaporization
c) Vaporization and melting
d) Condensation and sublimation

The complete combustion of octane, a component of gasoline, is represented by the equation: 2 c8h18(l) + 25 o2(g) →16 co2(g) + 18 h2o(l) how many liters of co2(g), measured at 63.1°c and 688 mmhg, are produced for every gallon of octane burned? (1 gal = 3.785 l; density of c8h18(l) = 0.703 g/ml)