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What are the 2 characteristics of an effective collision?

Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. Molecules must collide with the proper orientation. A collision that meets these two criteria, and that results in a chemical reaction, is known as a successful collision or an effective collision.

Why does meat spoil slower when left unsliced?

Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. Explain, why meat spoils less rapidly when left unsliced. Because when it is unsliced, there is less surface area, which means less collisions, which slow down the reaction.

How can a reaction be sped up?

Reaction Rates

  1. The concentration of the reactants. The more concentrated the faster the rate.
  2. Temperature. Usually reactions speed up with increasing temperature.
  3. Physical state of reactants.
  4. The presence (and concentration/physical form) of a catalyst (or inhibitor).
  5. Light.

Why would iron filings rust faster than a nail?

Iron fillings rust faster than an iron nail because they have a bigger surface area that is exposed to air and water than the nail, which is more solid in composition. Because of this, the fillings oxidize and form rust more easily than the nail.

Does temperature affect the rate of reaction?

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure.

Which of the following is the primary reason for a higher reaction rate at higher temperatures?

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Is ice melting Endergonic or Exergonic?

The change in entropy (S) decreases. Endergonic reactions are not spontaneous. Examples of endergonic reactions include endothermic reactions, such as photosynthesis and the melting of ice into liquid water.