Material Balance
Material balance involves calculations the quantities of all materials that enter and leave any system or process which are based on the principle of the "law of conversation of mass".…
Reaction Stoichiometry
Stoichiometry is a branch of chemistry that deals with the relative quantities of reactants and products that are consumed/produced within a given chemical reaction. In order to make any stoichiometric…
Real Gases – Deviation from the Ideal Gas Law
Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to…
Ideal Gas Mixtures
If you have ni moles of each species (for example nA moles of A), you can try to calculate the pressure or volume that that gas alone (i.e., ignoring the other gases…
What is an ideal gas?
Gases are complicated. They're full of billions and billions of energetic gas molecules that can collide and possibly interact with each other. Since it's hard to exactly describe a real…
Gas Pressure Formula
The force which the substance exerts on another substance per unit area is known as pressure. The pressure of the gas is the force that the gas exerts on the container boundaries. The gas molecules move randomly along the given volume. During this movement, they collide with the surface and also with each other. The impact of every individual gas molecule is…
Derived Units
The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity.…
Sequential Multi-Unit Systems
Let’s first examine a multi-unit system composed of a sequential combination of units. Figure 6.3a illustrates a sequential combination of mixing and splitting stages. Streams 1 and 2 combine to…
General Strategy for Solving Material Balance Problems
Most of the literature on problem solving views a “problem” as a gap between some initial information (the initial state or problem statement) and the desired information (the final state…


