According to collision theory, decreasing the concentration of the reactants in a chemical reaction decreases the frequency of the collisions between reactants, and therefore decreases the rate of the reaction.
Many chemical reactions are dependent on the temperature and heat provided. The rate at which the reaction occurs is directly proportional to the temperature.
At the atomic level, atoms are excited and are in motion in presence of high temperature. Higher the temperature, the more energy these atoms have. The more energy they have, the easier it is for them to break their present bonds, and react.
Thus on reducing the temperatures, the rate at which the chemical reaction occurs is reduced. It increases the time taken for the same reaction to occur otherwise, and the reaction itself is more controllable.
average velocity of the particles.
Temperature and volume vary directly, so if temperature decreases, so does volume. Volume decreases because the measure of the average kinetic energy of the gas particles (temperature) is decreasing also. When that happens, a gas cannot expand, and will decrease.
As the temperature is lowered, the movement of the molecules decreases.
temperature is proportional to 1/time taken for reaction to complete (rate of reaction)
How can the temperature DECREASE from 30.5ºC to 35.6ºC? That's an INCREASE in temperature. So, assuming you meant the temperature INCREASED to 35.6ºC, then it is an endothermic reaction.q = mC∆T = (1000 g)(4.184 J/g/deg)(5.1 deg) = 20,920 J = 20.9 kJ. This is the heat change for this reaction.
increasing the concentration increases the rate of the reaction
because the body saves energy by decreasing the metabolic reaction rate of oour body, thereby decreasing the temperature of the body
decreasing the temperature
The speed of a particle decreases with decreasing temperature. Decreasing temperature is associated with lower energy states, and the particle will have a lower energy state. It will be moving with less kinetic energy.
The molecules will not collide as often with the walls decreasing the volume
The maximum temperature is attained when the reaction is completed.
It depends on the order of the reaction. If it is zero order, decreasing the reactant concentration will have NO effect on the rate. If it is 1st or 2nd order (or more), then decreasing the concentration will DECREASE the reaction rate.
As the temperature increases, the reaction time decreases.
Decreasing the temperature of the system
For example by decreasing the temperature or concentration.
As indicated by Charles's Law, at constant pressure, the volume decreases when the temperature decreases. This is due to slowed collisions between molecules.
This is an endothermic reaction.
we can chang the temperature,decreasing the temp. presure is also decreases