4. The latent heat of vaporization of n-hexane at 25 °C is 366.1 J/g. What approximately is the value at 150 °C.

05: Acetylene gas (C₂H₂) at 25 °C is burned during a steady-flow combustion process with 30 percent excess air at 27 °C. It is observed that 75x10³ kJ of heat is being lost from the combustion chamber to the surroundings per kmol of acetylene. Assuming combustion is complete, determine the exit temperature of the product gases.

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Formaldehyde at 52.688 bar and 175.65 ℃ passes through a heater-expander and emerges at 39.516 bar and 420.45 ℃. There is no work into or out of the heater, but heat is supplied. Calculate the heat transfer into the heater-expander per mole of formaldehyde

If ice homogeneously nucleates at -57.8°C, calculate the critical radius given values of -3.1 x 108 J/m³ and 25 x 10-3 J/m2, respectively, for the latent heat of fusion and the surface free energy 0.9854 x 10-10 m O 0.1284 x 10-5 m O 0.5981 x 10-11 m O 0.7618 x 10-9 m

Q3. A mixed-base oil fraction of k=11.5 and API = 35, determine the latent heat of vaporization of this fraction at 400 °F. Edspeed