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Chemical Reactions, Thermodynamics

Across
A reaction where starting materials break down into smaller products.
The gain of electrons, loss of "O" content and gain of "H" content in a reaction.
When the activation energy, relative orientations and location of the colliding particles are appropriate the collision is said to be this.
The oxidation of iron to a mixture of iron oxides.
The study of the rates of chemical reactions.
A reaction or process that absorbs multiple types of energy forms.
The point in a reaction where 50% of the bonds are broken and formed.
A substance that increases the rate of a chemical reaction without itself being used up.
The process by which living organisms use oxygen to oxidize carbon containing compounds to produce CO2 and water.
Down
A measurement of an atom's/ion's/molecule's disorder.
The loss of electrons , gaining of "O" content and the loss of "H" content in a reaction.
With this type of starting material a reaction will be slower.
Reactions conducted in the presence of oxygen.
A reaction or process that gives off heat.
Enzymes are used to breakdown or make new compounds.
A reaction that may happen instantaneously and will continue once started.
A reaction that does not occur naturally and are forced to happen.
A factor affection rate in increments of 10.
Any reaction in which electrons are transferred from one species to another.
Products make larger molecules than the starting materials.