How Does Temperature Affect Rate Of Reaction

In reference to the collision theory, molecules act as small spheres that collide and bounce off each other, transferring energy among themselves when the collide. In order for a reaction to occur, there must be collisions between molecules. Through experimentation, factors are discovered that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, surface area, the physical state of reactants, and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and

Changes in the rate of reaction can be described in terms of chemical equilibrium. “Chemical equilibrium is a state in which the forward and reverse reactions take place at the same rate” (Wilbraham et al, 2002). The

Introduction: In everything there are things called particles; and sometimes when two particles meet a chemical reaction occurs. Also, with different strategies the chemical reaction can be sped up or slowed down. This is measured with reaction rate which is used to measure the length of a chemical reaction.

Limiting Reactant Lab Abstract The purpose of this lab was to use stoichiometry (fixed molar ratios) to determine quantitatively how Copper (II) Chloride and metallic aluminum react, known as an oxidation-reduction reaction. By varying the quantities of CuCl2H2O and Al and observing the reaction we were able to determine the limiting and excess reactants, and were also able to use stoichiometric calculations to determine the theoretical yield of Cu and then compare it to the actual yield of Cu to determine the percent yield of the reaction, which was found to be 22.5%. The percent yield of this experiment was less than desirable due to the fact that not enough Al was added to fully react all of the Cu. Using stoichiometry it was determined

A reaction rate is the speed at which a chemical reaction occurs. The reaction rate is affected by surface area by increasing the more surface area there is, because there are more particles exposed to the other reactant. For example, if a solid is grinded into a powder, the reaction rate will be quicker as there is more surface area.

Introduction: The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second. (Chem for Kids, 2016). Reactions require collisions between reactant molecules or atoms. The formation of bonds requires atoms to come close to one another. New bonds can form only if the atoms are close enough together to share electron. Higher temperatures make the collisions between molecules more violent. The higher temperatures mean higher velocities. This means there will be less time between collisions. The frequency of collisions will increase. (Chem, 1999) H2O2 is the chemical formula for hydrogen peroxide. The decomposition of hydrogen peroxide will break down into oxygen and water.

Many factors effect reaction rates, two shown above include temperature and concentration. Concentration affects the rate of reactions because the more concentrated a solution the more likely collisions between particles will be. This is simply because there are more particles present to collide with each other. When the temperature is higher, particles will

This image explains that the higher the temperature, the concentration, and the pressure the faster the rate of the reaction is.

Hydrochloric acid (HCl) has risks as it is a corrosive compound. Corrosive compounds, including HCl, can cause injuries such as burning and eating away skin and eyes. To prevent such injuries, do not come into physical contact with HCl. Wear safety glasses, safety gloves and lab clothing.

To determine what factors influence the rate of a chemical reaction and to make predictions based on these

It is the reactant that will deplete or will be used up first during a chemical reaction. Limiting reactant also determine how long the reaction will last for.

Not all reactant particles have the same kinetic energy at the same temperature. At a higher temperature, there are greater proportions of molecules that have kinetic energy more than activation energy.

An experiment that explores how temperature is used to speed up a reaction rate is the use of light sticks or glow sticks. If a light stick is refrigerated, once the seal is broken, the reaction will slow down and the light stick gives off light for longer periods of time. If the glow stick is room temperature, the reaction will speed up and the light goes out faster. Heat can be used to speed up a reaction to see the reaction occur quickly. The more energy molecules have, the more they combine. Conversely, scientist often use ice water to slow down reactions. When molecules have less energy, it takes them longer to combine.

Many things can affect the rate of reaction. One being the natural reactivity of the reactants themselves given their bonds and ionization energies. Also, the concentration

An increase in temperature increases the proportion of molecules that have kinetic energy above the escape energy. Lowering the temperature does the opposite. If the temperature of a liquid increases, then the molecules have more energy to help them escape.