# What is the mass balance equation?

## What is the mass balance equation?

A Mass Balance Equation describes the transient distribution of mass at every point in space. This represents the number of mass/moles of ‘i’ that go through a unit area in a unit time. As you might have guessed, it is composed of the diffusive and convective flux terms.

## What is mass balance in the body?

First, mass balance is a term that refers to balancing the amount of drug administered as a dose to the amount of drug-related material collected in human excreta (normally feces and urine, but also could include expired air and sweat).

What is the law of mass balance?

Law of mass balance says that if the amount of a substance in the body is to remain constant any gain must be offset by an equal loss or any loss must be offset by gain. For example loss of water by urination and sweating must be offset by drinking water. 7. Contrast local control and reflex control.

### What is reversible reaction give an example?

A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously. One example of a reversible reaction is the reaction of hydrogen gas and iodine vapor to from hydrogen iodide.

### What is the difference between mass balance and material balance?

A mass balance, also called a material balance, is an application of conservation of mass to the analysis of physical systems. By accounting for material entering and leaving a system, mass flows can be identified which might have been unknown, or difficult to measure without this technique.

What is unsteady state mass balance?

Unsteady-State Material and Energy Balances For the balance on total mass, RG and RC are zero; total mass cannot be generated or consumed by chemical reaction.

#### Why do we need mass balance?

Mass balances help us answer questions about the rate at which pollutants accumulate in a system, the maximum concentration that a pollutant might reach at a point in a river following an upstream spill, or the size of a reactor that we have to build to achieve a desired percentage reduction in a pollutant’s …