### Material and Energy Balances Quiz Screencasts

Each screencast has at least one interactive quiz during the video. The description above each video provides a brief summary.

- Adiabatic Flame Temperature Introduction
- Average Molecular Weight
- Bubble and Dew Points for Binary Mixtures
- Bypass Example
- Calculating the Percent Yield of a Reaction
- Cubic Equation of State Introduction
- Degree of Freedom Analysis on Multiple Units
- Degrees of Freedom Multiple Units
- Density, Specific Volume, and Specific Gravity
- Derive Equation for Boiling Point Elevation
- Description of an Evaporative Crystallization Process with Recycle
- Dimensional Analysis
- Energy Balance on a Reaction System Using Heat of Formation
- Energy Balance on a Reaction System Using Heat of Reaction
- Example of a Purge Process
- Extent of Reaction
- Flow Chart for Multiple Units
- Force and Weight
- Fractional Conversion
- General Balance Equation
- General Mass Balance on a Single Tank
- Heat Capacity Introduction
- Heat of Combustion
- Hess's Law
- How to Convert Units
- How to Determine Heat of Reaction from Heat of Formation
- How to Use a Psychrometric Chart
- How to Use Steam Tables
- Hypothetical Process Paths
- Ideal Gas Properties
- Including a Phase Change in an Energy Balance
- Introduction to Adsorption
- Introduction to Degrees of Freedom
- Introduction to Energy
- Introduction to the Mechanical Energy Balance Equation
- Introduction to Pressure
- Introduction to Solubility
- Langmuir Isotherm Dissociative Adsorption
- Langmuir Isotherm Introduction
- Latent Heat
- Manometers
- Mass and Mole Fractions
- Mass and Volumetric Flowrates Relationship
- Open and Closed Systems
- Overview of Combustion Chemistry
- Percent Excess Air
- Reference State Overview
- Scaling a Material Balance
- Significant Figures
- Single-Component Pressure-Temperature Diagram
- Standard Temperature and Pressure - Ideal Gas Law
- Stoichiometry
- Systems of Units
- Temperature Scales
- The Critical Point
- Three Methods for Balancing Reactive Processes
- Using Extent of Reaction for Multiple Reactions
- Using Solubility Diagrams for Material Balances
- Virial Equation of State Introduction
- Wet to Dry Basis
- What is a Quantity?
- What is Enthalpy?

**Description**: Defines adiabatic flame temperature, describes how to calculate it, and discusses issues that affect the accuracy of the calculation.

**Description**: Derives average molecular weight given mass or molar compositions.

**Description**: Discusses plot of temperature vs. mole fraction for an ideal binary solution, including bubble and dew points.

**Description**: Describes a bypass stream in a process and provides an example problem.

**Description**: Demonstrates how to use the percent yield in order to determine the amount of theoretical reagents needed in a reaction.

**Description**: Describes a cubic equation of state (EOS) and demonstrates how a real gas can differ from an ideal gas.

**Description**: Demonstrates using degree of freedom analysis on a multiple unit process to solve for unknown stream parameters.

**Description**: Demonstrates using degree of freedom analysis on a multiple unit process.

**Description**: Defines and differentiates density, specific volume, and specific gravity.

**Description**: Uses Raoult’s law and the Clausius-Clapeyron equation to derive an equation for the increase in boiling point of a solvent when a solute is added. The solute does not dissociate.

**Description**: Explains the steps in crystallization that includes an evaporator, a crystallizer and filter, and a recycle stream.

**Description**: Describes dimensional analysis.

**Description**: Explains the terms for a chemical reactor energy balance that uses enthalpies of reactants and products that are based on elements as reference states.

**Description**: Explains the terms for a chemical reactor energy balance that uses the heat of reaction and extent of reaction.

**Description**: Solves a material balance problem on a system with a purge.

**Description**: Describes extent of reaction method for solving material balances with chemical reactions. Includes example.

**Description**: Explains how to take a problem description and build a flowchart from it.

**Description**: Overview of SI and American Engineering units used for force.

**Description**: Defines the term fractional conversion.

**Description**: A general mass balance is presented and simplifications of the balance are shown for different processes.

**Description**: Introduction to processes and the general material balance. A short example on a tank with inlet and outlet flow.

**Description**: Defines heat capacity, shows how it depends on temperature, and shows how it is used to calculate enthalpy changes.

**Description**: Discusses how to use heat of combustion to determine reaction enthalpy

**Description**: Explains Hess’s law and provides an example of how to use it to solve for the heat of reaction for an equation.

**Description**: Explanation of how to convert units.

**Description**: Explains how to determine heats of reaction at 298 K from heats of formation and how to calculate heats of reaction at elevated temperatures.

**Description**: Explains how to read on a psychrometric chart: dry bulb temperature, relative humidity, moisture content, dew point temperature, enthalpy, humid air volume, and wet bulb temperature. The simulation is located at https://www.learncheme.com/simulations/mass-energy-balances/reading-a-psychrometric-chart.

**Description**: Introduces steam tables, explains how to use them, and explains the difference between superheated and saturated steam.

**Description**: Constructs a hypothetical process path to simplify calculations for state functions.

**Description**: This screencast introduces the concept of ideal gases and how to calculate enthalpy and internal energy changes for an ideal gas.

**Description**: Overview of sensible and latent heats and how to account for phase changes in energy balances.

**Description**: Explains the concept of adsorption and derives the Langmuir isotherm

**Description**: Explains how to calculate degrees of freedom and performs two examples on single unit processes.

**Description**: An introduction to the first law and explanation of the terms in the energy balance.

**Description**: The mechanical energy balance is obtained from the steady-state energy balance, and under some conditions, it simplifies to the Bernoulli equation.

**Description**: Defines the different types of pressure. Uses head pressure to solve an example problem.

**Description**: Explains the meanings of saturated and supersaturated solutions and discusses the temperature dependence of solubility.

**Description**: Derives the Langmuir isotherm for dissociative adsorption of hydrogen on a Pt catalyst.

**Description**: An introduction to Langmuir Isotherms.

**Description**: Provides an overview of latent heat. Calculates the heat required to vaporize and condense 100 mol of water at 100°C and atmospheric pressure.

**Description**: An overview on manometers and how they are used to determine force differentials.

**Description**: An overview on how to change molar fractions to mass fractions and vice-versa.

**Description**: A description on the relationship between density, mass flow rate and volumetric flow rate. An example conceptual problem is discussed.

**Description**: Gives the energy balance for both open and closed systems and compares the two.

**Description**: Overview of combustion which is the reaction of fuel (usually hydrocarbons) with oxygen to produce water, carbon dioxide/carbon monoxide, and energy. Quickly reviews percent excess air and wet/dry basis

**Description**: Introduces percent excess air for combustion reactions.

**Description**: Explains reference states and shows how to use them in calculating enthalpy changes for a variety of systems

**Description**: Describes how to obtain and use a scaling factor.

**Description**: The rules for significant figures are presented. Examples are given of how to add, subtract, multiply, and divide numbers so that the answer has the correct number of significant figures.

**Description**: Describes Pressure-Temperature diagram for a single-component.

**Description**: Overview of standard conditions (temperature and pressure) and its use with the ideal gas law.

**Description**: Reviews stoichiometry and limiting reactants.

**Description**: Compares SI and American units. Discusses base units and derived units.

**Description**: Describes the different temperature scales.

**Description**: Explains what the critical point is and shows constant volume process at the critical volume, includes a demo.

**Description**: Uses three different methods for solving reaction problems.

**Description**: Uses the extent of reaction method for two reactions.

**Description**: Uses a salt solubility diagram to determine concentrations of salt solute in water for a crystallizer material balance.

**Description**: Introduction to the Virial equation of state.

**Description**: Discusses the difference between wet and dry basis analysis. Shows how to convert from a wet basis to a dry basis.

**Description**: Defines quantity with value and units.

**Description**: Presents the definition of enthalpy, its differential, and its use in energy balances.