Fundamentals of Chemical Engineering

A #

A

Activation Energy #

The minimum amount of energy required for a chemical reaction to occur #

It is the energy barrier that must be overcome for the reaction to proceed. Higher activation energy means the reaction is slower. Activation energy is denoted by Ea.

Amine #

A type of organic compound derived from ammonia by replacing one or more hydroge… #

Amines are commonly used in chemical processes as catalysts or reactants.

Ammonia #

A colorless gas with a pungent odor, composed of one nitrogen atom and three hyd… #

Ammonia is widely used in the chemical industry as a fertilizer, refrigerant, and in the production of various chemicals.

Atom #

The basic unit of matter that consists of a nucleus containing protons and neutr… #

Atoms are the building blocks of all chemical substances.

Atomic Number #

The number of protons in the nucleus of an atom, which determines the element's… #

It is denoted by the symbol Z.

Avogadro's Number #

The number of particles (atoms, molecules, ions) in one mole of a substance, app… #

022 x 10^23. Avogadro's number is a fundamental constant in chemistry.

B #

B

Binary Mixture #

A mixture composed of two different chemical substances #

Binary mixtures are common in chemical engineering processes and can exhibit unique properties based on the components and their interactions.

Boiling Point #

The temperature at which a substance changes from liquid to vapor at a given pre… #

The boiling point is a characteristic property of a substance and can be used to identify and separate different compounds.

Buffer Solution #

A solution that resists changes in pH when an acid or base is added to it #

Buffer solutions are essential in chemical processes to maintain a stable pH environment.

C #

C

Catalyst #

A substance that increases the rate of a chemical reaction without being consume… #

Catalysts lower the activation energy required for the reaction to occur.

Chemical Equilibrium #

A state in a chemical reaction where the rates of the forward and reverse reacti… #

Chemical equilibrium is a dynamic process.

Chemical Kinetics #

The study of reaction rates and mechanisms, including factors that influence the… #

Chemical kinetics helps in understanding the dynamics of chemical processes.

Chemical Reactor #

A device or vessel where chemical reactions take place #

Chemical reactors are designed to optimize reaction conditions such as temperature, pressure, and residence time.

Concentration #

The amount of a substance present in a unit volume of a solution #

Concentration can be expressed in various units such as molarity, molality, and weight percent.

Critical Point #

The temperature and pressure at which a substance exists as a supercritical flui… #

The critical point is a unique state of matter.

D #

D

Distillation #

A separation process that utilizes the differences in boiling points of componen… #

Distillation is a common technique in chemical engineering for purifying liquids.

Double Bond #

A covalent bond formed by sharing two pairs of electrons between two atoms #

Double bonds are found in many organic compounds and influence their reactivity and physical properties.

E #

E

Electrolyte #

A substance that dissociates into ions when dissolved in a solvent, thus allowin… #

Electrolytes are essential in many chemical processes, such as batteries and electrolysis.

Element #

A pure substance composed of only one type of atom #

Elements are the simplest form of matter and are listed in the periodic table according to their atomic number.

Enthalpy #

A measure of the heat content of a system at constant pressure #

Enthalpy is denoted by the symbol H and is often used in thermodynamic calculations.

Entropy #

A measure of the disorder or randomness in a system #

Entropy is denoted by the symbol S and is a key concept in thermodynamics related to the second law of thermodynamics.

Equilibrium Constant #

A numerical value that describes the ratio of concentrations of products to reac… #

The equilibrium constant is denoted by K and varies with temperature.

F #

F

Fugacity #

A measure of the escaping tendency of a component in a mixture or solution #

Fugacity accounts for non-ideal behavior and is used in thermodynamics to calculate equilibrium conditions.

G #

G

Gibbs Free Energy #

A thermodynamic potential that measures the maximum reversible work that can be… #

Gibbs free energy is denoted by the symbol G and is used to predict the spontaneity of a reaction.

H #

H

Heat Capacity #

The amount of heat energy required to raise the temperature of a substance by on… #

Heat capacity is an extensive property that depends on the mass of the substance.

Hydrogen Bond #

A type of strong intermolecular force that occurs between a hydrogen atom bonded… #

Hydrogen bonds play a crucial role in determining the properties of many substances.

I #

I

Inhibitor #

A substance that slows down or prevents a chemical reaction #

Inhibitors are used in chemical processes to control reaction rates and minimize unwanted side reactions.

Ion #

An atom or molecule that has a net electrical charge due to the loss or gain of… #

Ions play a key role in many chemical processes, such as electrolysis and ionic bonding.

Isomer #

Two or more compounds that have the same molecular formula but different arrange… #

Isomers exhibit different chemical and physical properties.

J #

J

K #

K

Kinetic Energy #

The energy possessed by an object due to its motion #

Kinetic energy is related to the speed and mass of the object and is a fundamental concept in thermodynamics.

L #

L

Lewis Structure #

A diagram that represents the bonding between atoms in a molecule using lines to… #

Lewis structures are essential for understanding the structure and properties of chemical compounds.

M #

M

Molar Mass #

The mass of one mole of a substance, expressed in grams per mole #

Molar mass is calculated by summing the atomic masses of all atoms in a molecule.

Mole #

A unit of measurement used in chemistry to express the amount of a substance #

One mole is equal to Avogadro's number of particles.

N #

N

Nernst Equation #

An equation that relates the equilibrium constant of a reaction to the standard… #

The Nernst equation is used in electrochemistry to calculate cell potentials under non-standard conditions.

O #

O

Oxidation #

A chemical reaction in which a substance loses electrons, resulting in an increa… #

Oxidation reactions are vital in many chemical processes, such as combustion and corrosion.

P #

P

pH #

A measure of the acidity or basicity of a solution, determined by the concentrat… #

pH is a logarithmic scale ranging from 0 to 14, with 7 being neutral.

Periodic Table #

A tabular arrangement of elements based on their atomic number and chemical prop… #

The periodic table is a fundamental tool in chemistry for predicting the behavior of elements.

Phase Diagram #

A graphical representation of the equilibrium conditions between different phase… #

Phase diagrams are used to understand phase transitions.

Q #

Q

Quantum Mechanics #

The branch of physics that describes the behavior of particles at the atomic and… #

Quantum mechanics is essential in understanding the electronic structure of atoms and molecules.

R #

R

Rate Constant #

A proportionality constant that relates the rate of a chemical reaction to the c… #

Rate constants are determined experimentally and depend on temperature.

Reaction Rate #

The speed at which a chemical reaction takes place, usually expressed in terms o… #

Reaction rates depend on factors such as temperature and catalysts.

S #

S

Saturated Solution #

A solution that contains the maximum amount of solute that can dissolve at a giv… #

Saturated solutions are in equilibrium with undissolved solute at the bottom of the container.

Stoichiometry #

The quantitative relationship between reactants and products in a chemical react… #

Stoichiometry involves balancing chemical equations and determining the amounts of substances involved.

T #

T

Thermodynamics #

The branch of science that deals with the study of energy and its transformation… #

Thermodynamics governs the behavior of matter and energy.

U #

U

Unsaturated Solution #

A solution that contains less solute than the maximum amount that can dissolve a… #

Unsaturated solutions have the capacity to dissolve more solute.

V #

V

Valence Electrons #

The electrons in the outermost energy level of an atom that are involved in bond… #

Valence electrons determine the chemical properties of an element.

Viscosity #

A measure of a fluid's resistance to flow #

Viscosity is influenced by factors such as temperature and molecular structure and is essential in designing fluid systems.

W #

W

Work #

The transfer of energy due to a force acting over a distance #

Work can be done on or by a system and is a key concept in thermodynamics related to energy transformations.

X #

X

Xenon #

A noble gas element with the symbol Xe and atomic number 54 #

Xenon is used in various applications, such as lighting, anesthesia, and as a propellant in ion thrusters.

Y #

Y

Yield #

The amount of product obtained in a chemical reaction compared to the theoretica… #

Yield is expressed as a percentage and indicates the efficiency of the reaction.

Z #

Z

Zinc #

A metallic element with the symbol Zn and atomic number 30 #

Zinc is commonly used in alloys, batteries, and as a coating to prevent corrosion in steel.