23 Questions
Which of the following best describes transport phenomena?
The movement of physical quantities in any chemical or mechanical process
What are the three closely related topics included in transport phenomena?
Fluid dynamics, heat transfer, and mass transfer
Why should the three transport phenomena be studied together?
They frequently occur simultaneously in various problems
What does fluid dynamics involve?
The transport of momentum
What does mass transfer concern?
The transport of mass of various chemical species
Which level of transport phenomena focuses on the mass, momentum, energy, and angular momentum changes within a small region of the system?
Microscopic level
What is the purpose of examining the fluid mixture in a small region within the equipment?
To get information about velocity, temperature, pressure, and concentration profiles
What do the macroscopic balances equations describe?
The changes in mass, momentum, energy, and angular momentum in the system
What is the aim of examining the molecular level of transport phenomena?
To seek a fundamental understanding of the mechanisms of mass, momentum, energy, and angular momentum
What does the transport of mass, momentum, energy, and angular momentum involve?
Three different levels
Which unit is commonly used to express energy in the SI system?
Joules (J)
What is the definition of a calorie (cal)?
The amount of heat needed to heat 1.0 g water 1.0°C
What is the relationship between kilocalorie (kcal) and calorie (cal)?
1 kcal = 1000 cal
What is the definition of a British thermal unit (btu)?
The amount of heat needed to raise 1.0 lb water 1°F
Which unit is commonly used to express energy in the SI system?
Joules (J)
What is the definition of a calorie (cal)?
The amount of heat needed to heat 1.0 g water 1.0°C
What is the relationship between kilocalorie (kcal) and calorie (cal)?
1 kcal = 1000 cal
What is the definition of a British thermal unit (btu)?
The amount of heat needed to raise 1.0 lb water 1°F
Which unit is commonly used to express heat capacity in the SI system?
J/kg mol · K
What is the heat capacity of a substance defined as?
The amount of heat necessary to increase the temperature by 1 degree
What is the relationship between the heat capacity in mass units and in molar units?
The actual numerical value is the same
What is the enthalpy, H, of a substance in J/kg?
The sum of the internal energy plus the pressure–volume term
What are relatively large amounts of heat change involved in?
Change of phase
Study Notes
Transport Phenomena
- Transport phenomena refer to the transport of mass, momentum, energy, and angular momentum from one location to another.
Three Closely Related Topics
- The three closely related topics included in transport phenomena are fluid dynamics, mass transfer, and heat transfer.
Importance of Studying Transport Phenomena Together
- The three transport phenomena should be studied together because they often occur simultaneously and are interdependent.
Fluid Dynamics
- Fluid dynamics involves the study of the motion of fluids and the forces that act upon them.
Mass Transfer
- Mass transfer concerns the transport of mass from one location to another.
Microscopic Level
- The microscopic level of transport phenomena focuses on the mass, momentum, energy, and angular momentum changes within a small region of the system.
Purpose of Examining Fluid Mixture
- The purpose of examining the fluid mixture in a small region within the equipment is to understand the transport phenomena at the microscopic level.
Macroscopic Balances Equations
- The macroscopic balances equations describe the changes in mass, momentum, energy, and angular momentum within a system.
Aim of Examining Molecular Level
- The aim of examining the molecular level of transport phenomena is to understand the mechanisms of transport at the molecular level.
Transport of Mass, Momentum, Energy, and Angular Momentum
- The transport of mass, momentum, energy, and angular momentum involves the movement of particles or fluid from one location to another.
Energy Units
- In the SI system, energy is commonly expressed in joules (J).
- A calorie (cal) is a unit of energy equal to 4.184 J.
- A kilocalorie (kcal) is equal to 1,000 calories (cal).
- A British thermal unit (btu) is a unit of energy equal to 1,054.35 J.
Heat Capacity
- Heat capacity is commonly expressed in the SI system as joules per kilogram per kelvin (J/kgK).
- The heat capacity of a substance is defined as the amount of energy required to change the temperature of a unit mass of the substance by one degree.
- The heat capacity in mass units (J/kgK) is related to the heat capacity in molar units (J/molK) by the molecular weight of the substance.
Enthalpy
- The enthalpy, H, of a substance is defined as the total energy of the substance per unit mass, measured in J/kg.
Large Heat Changes
- Relatively large amounts of heat change are involved in phase transitions, such as melting and boiling.
Test your knowledge on Transport Phenomena with this quiz! Explore the principles and laws of fluid dynamics, heat transfer, and mass transfer. Challenge yourself to answer questions on the movement of physical quantities in chemical and mechanical processes. Perfect for students and enthusiasts alike.
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