Input interpretation
2 kg of N-pentane
Basic properties for 2 kg
mass | 2 kg (kilograms) 4.41 lb (pounds) 4 pounds 6.5 ounces 2000 grams molar amount | 27.7 mol (moles) volume | 3.19 L (liters) 0.00319 m^3 (cubic meters) 3190 cm^3 (cubic centimeters) 6.75 pints 3.37 quarts 0.844 gallons 0.113 ft^3 (cubic feet) 195 in^3 (cubic inches) (at STP)
Corresponding quantities
sphere radius | 9.136 cm (centimeters) side of a cube | 0.1473 meters
Thermodynamic properties for 2 kg
enthalpy of hydration | -784.5 kJ (kilojoules) | heat capacity C_p | liquid | 4635 J/K heat of formation Δ_fH° | gaseous | -4072 kJ latent heat of vaporization | 788 kJ (kilojoules) | latent heat of fusion | 233 kJ (kilojoules) |
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Energy vs. temperature for 2 kg
(relative to STP)
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Phase change energies for 2 kg from 25 °C
energy required to heat to boiling point | 51.3 kJ (kilojoules) energy required to convert to vapor | 788 kJ (kilojoules) energy required to heat to boiling point and convert to vapor | 839 kJ (kilojoules) energy released from cooling to freezing point | 717 kJ (kilojoules) energy released from converting to solid | 233 kJ (kilojoules) energy released from cooling to freezing point and converting to solid | 950 kJ (kilojoules)
Mass composition for 2 kg
C (carbon) | 1.665 kg (83.2%) H (hydrogen) | 0.335 kg (16.8%)
Mass composition for 2 kg
Lewis structure
Draw the Lewis structure of N-pentane. Start by drawing the overall structure of the molecule: Count the total valence electrons of the carbon (n_C, val = 4) and hydrogen (n_H, val = 1) atoms: 5 n_C, val + 12 n_H, val = 32 Calculate the number of electrons needed to completely fill the valence shells for carbon (n_C, full = 8) and hydrogen (n_H, full = 2): 5 n_C, full + 12 n_H, full = 64 Subtracting these two numbers shows that 64 - 32 = 32 bonding electrons are needed. Each bond has two electrons, so the above diagram has all the necessary bonds. There are 16 bonds and hence 32 bonding electrons in the diagram. Lastly, fill in the remaining unbonded electrons on each atom. In total, there remain 32 - 32 = 0 electrons left to draw and the diagram is complete: Answer: | |
Chemical names and formulas
formula | CH_3(CH_2)_3CH_3 Hill formula | C_5H_12 name | N-pentane IUPAC name | pentane
Substance properties
molar mass | 72.15 g/mol phase | liquid (at STP) melting point | -129.67 °C boiling point | 36.06 °C density | 0.6262 g/cm^3 surface tension | 0.016 N/m dynamic viscosity | 2.24×10^-4 Pa s (at 25 °C) odor | gasoline-like odor threshold | 400 ppm
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