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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.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoMany 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.
Wiki User
∙ 14y agoaverage velocity of the particles.
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What happens to a volume of a gas when temperature is decreased?
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.
What happens to the movement of molecules when their temperature is?
As the temperature is lowered, the movement of the molecules decreases.
Are reaction time and temperature directly proportional?
temperature is proportional to 1/time taken for reaction to complete (rate of reaction)
If I dissolve 50 grams of salt in 1000 mL of water and the temperature decreases from 30.5 and degC to 35.6 and degC what is the heat change enthalpy of reaction Was this an exothermic or endothermic?
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.
What effects does the concentration of reactants have on the rate of the reaction?
increasing the concentration increases the rate of the reaction
Why the body temperature decreases when you do not eat food?
because the body saves energy by decreasing the metabolic reaction rate of oour body, thereby decreasing the temperature of the body
What decreases the rate at which a substance melts?
decreasing the temperature
What happens to the speed of a particle as temperature decreases?
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.
How does decreasing the temperature affect the volume of a gas?
The molecules will not collide as often with the walls decreasing the volume
Why does the temperature of a reaction increases reaches a maximum and then decreases?
The maximum temperature is attained when the reaction is completed.
How will decreasing the reactant concentration affect the reaction?
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.
How is the rate of reaction affected when the temperature increases?
As the temperature increases, the reaction time decreases.
Which would lower reaction rate?
Decreasing the temperature of the system
How not to increase the rate of reaction?
For example by decreasing the temperature or concentration.
How does decreasing the temperature affect the volume of the gas?
As indicated by Charles's Law, at constant pressure, the volume decreases when the temperature decreases. This is due to slowed collisions between molecules.
When Energy is absorbed from the surroundings and the temperature of the surroundings decreases' What reaction is this?
This is an endothermic reaction.
How can you decrease the preassure without increasing the area?
we can chang the temperature,decreasing the temp. presure is also decreases
