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Thermochemistry

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Abstract

Thermochemistry is the branch of physical chemistry that is concerned with the amounts of energy released or absorbed when a chemical change (reaction) takes place [1–3]. Inasmuch as fire is fundamentally a manifestation of a particular type of chemical reaction, viz., combustion, thermochemistry provides methods by which the energy released during fire processes can be calculated from data available in the scientific and technical literature.

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Nomenclature, Subscripts and Superscripts

A

Area (Equation 5.5)

A w

Area of ventilation opening

C p

Specific heat

E

Internal energy

F

Force (Equation 5.4)

H

Height of ventilation opening

H

Enthalpy

ΔH c

Heat of combustion

ΔH f

Heat of formation

Mass rate of burning

air

Mass flow rate of air

n

Number of moles

p

Pressure

q

Energy

Q c

Rate of heat release

R

Universal gas constant

T

Temperature

V

Volume

w

Work

c

Combustion

F

Final

f

Formation

o

Initial

p

Constant pressure

v

Constant volume

Pr

Products

R

Reactants

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Drysdale, D.D. (2016). Thermochemistry. In: Hurley, M.J., et al. SFPE Handbook of Fire Protection Engineering. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2565-0_5

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  • DOI: https://doi.org/10.1007/978-1-4939-2565-0_5

  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4939-2564-3

  • Online ISBN: 978-1-4939-2565-0

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