What is the enthalpy of fusion of naphthalene?
19.0 KJ mol
Given that the latent heat of fusion of naphthalene is `19.0 KJ mol^(-1)` and its melting point is `80.2^(@)C`.
What is sublimation of naphthalene?
Naphthalene. Naphthalene is a solid that sublimes at standard atmospheric temperature with the sublimation point at around 80 °C or 176 °F. At low temperature, its vapour pressure is high enough, 1 mmHg at 53 °C, to make the solid form of naphthalene evaporate into gas.
What is the heat of formation of naphthalene?
With this and related other data, values were calculated for the standard heats of formation at 25̊ C for naphthalene. The enthalpy of combustion and the enthalpy of formation of naphthalene were found to be 5320 ± 110 kJ/mole and 246 ± 115 kJ/mole, respectively.
What happens when naphthalene melts?
Freezing Point is the Melting Point This would be the melting point of naphthalene. After melting is complete, the temperature will begin to rise again until it reaches 218o C. It will stay at that point until boiling is complete. This would be considered the boiling point of naphthalene.
Is naphthalene pure or impure?
determination of a melting point, eg for naphthalene (pure substance) or candle wax (impure substance)
What is the heat of combustion per gram of naphthalene?
The standard enthalpy of combustion of naphthalene is -5157 kJ/mol.
What will happen if heat is given to camphor?
When camphor is heated then it will not be converted to liquid state, but it will be directly converted to gaseous phase. this is called sublimation. also when you bring flame near to the camphor it catches fire and burns.
How is heat of sublimation of naphthalene measured?
A New Method for the Measurement of Enthaplies of Sublimation Using Differential Scanning Calorimetry. Thermochim.Acta 124 (1988) 229-233 Sanemasa I.; Ishibashi K.; Kumamaru M.; Deguchi T.: A modified vapor saturation method for preparing aqueous solutions of solid aromatic hydrocarbons.. Bull.Chem.Soc.Japan 62 (1989) 2908-2912
How does enthalpy relate to the process of sublimation?
Although the process of sublimation does not involve a solid evolving through the liquid phase, the fact that enthalpy is a state function allows us to construct a “thermodynamic cycle” and add the various energies associated with the solid, liquid, and gas phases together (e.g., Hess’ Law).
What are some of the physical properties of naphthalene?
ΔvapH: Enthalpy of vaporization at a given temperature (kJ/mol). IE: Ionization energy (eV). logPoct/wat: Octanol/Water partition coefficient. Pc: Critical Pressure (kPa). ΔfusS: Entropy of fusion at a given temperature (J/mol×K). S°liquid: Liquid phase molar entropy at standard conditions (J/mol×K).
Which is enthalpy of fusion at a given temperature?
ΔfH°solid: Solid phase enthalpy of formation at standard conditions (kJ/mol). ΔfusH°: Enthalpy of fusion at standard conditions (kJ/mol). ΔfusH: Enthalpy of fusion at a given temperature (kJ/mol). ΔsubH°: Enthalpy of sublimation at standard conditions (kJ/mol). ΔsubH: Enthalpy of sublimation at a given temperature (kJ/mol).