Investigation in to the factors that affects the rate of fermentation of Glucose

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Investigation in to the factors that affects the rate of fermentation of Glucose

Aim:

To investigate the factors that affects the rate of fermentation of
Glucose.

Background knowledge.

ENZYMES

Fermentation is a form of an anaerobic respiration where by glucose is partially broken down so only a small amount of energy is released.
The yeast cells use the enzymes, ZYMASE to break down sugars unable to obtain. GLUCOSE CARBON DIOXIDE + ETHANOL(+ENERGY) C6 H12 O6 6CO2 + C2H5OH (210KJ)

Enzymes have several properties.

1) Specific actions-Zyamse in yeast works on glucose.

2) A small amount is required as the enzyme is used again and again as it is uncharged at the end therefore one of my variables could be varying the quantity
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Due to high temperature the energy increases of the collisions, because it makes all particles move faster.

INCREASING THE TEMPERATURE ONLY CAUSES FASTER COLLISIONS.

KINETIC THEORY

'The behavior of molecules of solids, liquids and gases depending on their state of pressure and temperature since kinetic theory is the nergy of movement,'

The 3 states, solids, liquids and gases have a different type of kinetic energy.

KINETIC THEORY OF GASES.

1) gases consist of a very large number of extremely small particles (molecules) which are in state of continuous rapid motions.

2) The molecules move in straight lines until they collide with one another or with the wall of the container.

3) The collisions are perfectly elastc ie. There is no change in the total energy as a result of a collision.

4) The distances between the molecules are largecompared to their size. The supposition is indicated by the great compressibility of gases.

5) The molecules are so far apart the the attractive forces between them are neligible.

KINETIC THEORY OF LIQUIDS.

The main difference between liquids and gases is that the molecules in a liquid are much closer together. Therfore the molecules in a liquid are less free to move about independently. The velocities of the molecules will be continually changing as a result of the collisions.
Many molecules will have the average welocities, whilst some will have either a greater or slower velocities. Some fast molecules

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