0
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.
What else can I help you with?
What happens to a volume of a gas when temperature is decreased?
Gas expands as its temperature increases and contracts as its temperature decreases. That's why balloons often pop when held close to a heat source; the gas inside them expands and breaks the balloon.
Can you generalize that the higher the layer of the atmosphere the hotter the temperature Why or why not?
No, you cannot generalize that the higher the layer of the atmosphere, the hotter the temperature. In the troposphere, temperature decreases with altitude due to the decreasing pressure and density of air. However, in the stratosphere, temperature actually increases with altitude because of the absorption of ultraviolet radiation by the ozone layer. Thus, temperature variations in the atmosphere depend on specific layers and their characteristics.
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.
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.
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 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.
You can slow down the rate of reaction by?
You can slow down the rate of a reaction by decreasing the temperature, decreasing the concentration of reactants, increasing the activation energy needed for the reaction to take place, or using an inhibitor to interfere with the reaction process.
How can you decrease the preassure without increasing the area?
we can chang the temperature,decreasing the temp. presure is also decreases
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.
What speeds up reaction and slows down reaction?
Factors that can speed up a reaction include increasing temperature, adding a catalyst, or increasing the concentration of reactants. On the other hand, factors that can slow down a reaction include decreasing temperature, decreasing the concentration of reactants, or increasing the activation energy required for the reaction.
