Close

## Why is 1 T used as a measure of rate of reaction?

1/t means that the order of reaction is a first order. Meaning that the rate of reaction is directly proportional to reactant concentration. 1/t means that the order of reaction is a first order. Meaning that the rate of reaction is directly proportional to reactant concentration.

## How do you determine the order of a chemical reaction?

The overall order of the reaction is found by adding up the individual orders. For example, if the reaction is first order with respect to both A and B (a = 1 and b = 1), the overall order is 2. We call this an overall second order reaction.

## What makes a successful 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.

## What factors determine whether a collision between two reactant molecules will result in a reaction?

Therefore, the factors that determine whether a collision between two molecules will lead to a chemical reaction are the concentration of reactants, temperature, and shape of the molecules.

## What two factors affect spontaneity of a reaction?

Spontaneous reactions release free energy as they proceed. Recall that the determining factors for spontaneity of a reaction are the enthalpy and entropy changes that occur for the system. The free energy change of a reaction is a mathematical combination of the enthalpy change and the entropy change.

## Do all collisions result in a reaction?

All collisions do not lead to chemical reactions because not all collisions have enough energy for a reaction to occur, and not all collisions have proper orientation for a reaction to occur.

## Why do most collisions not result in a reaction?

Reactions can only occur when reacting particles collide with enough energy. This energy is called the activation energy. Most collisions do not result in reaction. Increasing the concentration of reactants increase the number of particles available to react.

## Why some collisions may not result in a chemical reaction?

The reactants either may be moving too slowly to have enough kinetic energy to exceed the activation energy for the reaction, or the orientation of the molecules when they collide may prevent the reaction from occurring.

2021-06-17