Table of Contents
- 1 How do you find the heat combustion of naphthalene?
- 2 How do you calculate heat of formation?
- 3 What is the heat capacity of naphthalene?
- 4 How do you find the heat of formation from the heat of combustion?
- 5 What is the melting point of naphthalene?
- 6 How do you find the heat of combustion of a mixture?
- 7 What is the molecular formula for naphthalene?
- 8 How much naphthalene is released into the air?
How do you find the heat combustion of naphthalene?
The reaction for the combustion of naphthalene is:C10H8 (s) + 12 O2 (g) → 10CO2 (g) + 4 H2O (l)
How do you calculate heat of formation?
This equation essentially states that the standard enthalpy change of formation is equal to the sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants. and the standard enthalpy of formation values: ΔH fo[A] = 433 KJ/mol. ΔH fo[B] = -256 KJ/mol.
How is heat of reaction calculated?
The heat of reaction can be calculated based on the standard heat of formation of all reactants involved. However, it is usually determined by measuring the heat production over time using a reaction calorimeter, such as a heat flow calorimeter.
What is the heat capacity of naphthalene?
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | 195.8 |
Temperature (K) | 298.1 |
Reference | Eibert, 1944 |
Comment | |
---|---|
T = 30 to 200°C, equations only in t°C. Cp(c) = 0.365 cal/g*K (30 to 80°C); Cp(liq) = 0.329 + 0.000824t cal/g*K (80 to 200°C).; DH |
How do you find the heat of formation from the heat of combustion?
Combustion Heat
- Standard heat of combustion: The energy liberated when a substance X undergoes complete combustion, with excess of oxygen at standard conditions (25°C and 1 bar).
- Example:
- The heat of combustion of ethanol, ΔHc°(C2H6O, l) = 2*393.51 + 6*142.915 + (-277.6) = 1366.91 kJ/mol.
What is the boiling point of naphthalene?
424.4°F (218°C)
Naphthalene/Boiling point
What is the melting point of naphthalene?
176.5°F (80.26°C)
Naphthalene/Melting point
How do you find the heat of combustion of a mixture?
It is the same as the gross heating value or energy content. Then, the heat of combustion can be calculated from the standard enthalpy of formation (ΔHf°) of the substances involved in the reaction, given as tabulated values….
Name | Acetylene (ethyne) |
---|---|
Formula | C2H2 |
State* | gas |
ΔHc° kJ/mol | 1300 |
ΔHc° kJ/g or MJ/kg | 49.92 |
What is the standard enthalpy of combustion of naphthalene?
The standard enthalpy of combustion of naphthalene is -5157 kJ/mol. Calculate its standard enthalpy of formation.
What is the molecular formula for naphthalene?
PubChem CID 931 Structure Find Similar Structures Chemical Safety Laboratory Chemical Safety Summary (LCSS Molecular Formula C10H8 Synonyms naphthalene 91-20-3 Naphthalin Naphthene
How much naphthalene is released into the air?
(1) Naphthalene is released to the air from the burning of coal and oil and from the use of mothballs. Coal tar production, wood preserving, and other industries release small amounts. (1) Typical air concentrations of naphthalene in cities are about 0.18 parts per billion (ppb).
How do you test for naphthalene exposure?
Assessing Personal Exposure. Naphthalene or its breakdown products can be measured in fat, urine, and feces. These tests cannot be used to find out how much exposure occurred and require special equipment not routinely available in a doctor’s office.