An increase in temperature affects the reaction rate by decreasing the velocities of particles that collide in the reaction. increasing the?
An increase in temperature affects the reaction rate by A) decreasing the velocities of particles that collide in the reaction. B) increasing the number of molecules that have sufficient kinetic energy to react. C) increasing the number of molecules that have sufficient potential energy to react. D) decreasing the energy that particles need to overcome the energy activation barrier.
What is the effect of increase in temperature on the rate of a reaction?
Increases the rate of reaction:Adding thermal energy to the system allows this the particles to vibrate faster and afster as thermal energy is converted into kinetic energy.The faster the particles are moving allows for more successful collisions to take place between particles.As a result, the products of the reaction will be made in greater quantity in a given time period.Hence, the overall rate of reaction has increased.
How does increasing the temperature usually affect the rate of a chemical reaction.?
increased temp speeds up particles and increases the likelihood and energy of collisions so higher T increases the rate of reaction however the confusion arises when heating up an exothermic process because that will result in reduced output of products even though the process happens faster
How does surface area affects rate of reaction?
Increasing the surface area of a substance in the chemical reaction increases the exposure of that material to the reactant. Hence, the reaction process speeds up. A powdered substance undergoes faster reaction than a solidified substance.For example, a solid chunk of iron will rust slower than a pile of iron filings. This is because, the surface area of iron filing is more as compared to the solid chunk of iron.
How does each of the following affect reaction rate? (faster or slower)?
Increasing temperature= Increasing concentration= Increasing pressure= Increasing surface area= Decreasing temperature= Decreasing concentration= Decreasing pressure= Decreasing surface area=
If temperature increases, pressure increases. Does temperature increase if pressure increases?
Temperature and pressure are directly proportionalto each other. This means that as the temperaturedecreases, the pressure also decreases, and as thetemperature increases, the pressure increases. Oneway to think of this is if you increase the speed of themolecules –by increasing their temperature- theforce of the molecules hitting their containerincreases and this increases the pressure. Thisrelationship is called Gay-Lussac’s Law and makes up part of the ideal gas law.TheoryWhen the speed of a gas’s molecules increases, the gas molecules hit their container more often. Themore frequently the gas impacts the container walls, the higher the pressure. So, as temperature in-creases, the pressure also increases. If the gas cools, the impacts are less frequent and the pressure decreasesThis relationship can be described using mathematics as well. Mathematically, Gay-Lussac’s Law statesthatP/T = kwhere k is any constant.This relationship explains why race car tires are not filled with as much air as normal tires. At the highspeeds of race cars, the air inside the tires heats up, causing the pressure to increase. Tires with too high apressure have less contact with the road and are more easily damaged. So, the cold tire pressure for arace car is lower than a normal car. As air sinks, it encounters higher pressures and the temperature in-creases. This characteristic of gases leads to the definition of potential temperature. The potential tem-perature is the temperature a parcel of air would have if it was moved to 100,000 Pa, although this defini-tion does not require volume to be held constant.This experiment shows how pressure changes under different temperatures.Gay-Lussac's Law is one part of the ideal gas law and so explains how gases change when volume is held constant. As the temperature increases, the molecules in the gas move faster, impacting the gas's container more frequently and exerting a greater force. This increases the pressure.
Which of the following factors would increase the rate of a reaction? (Select all that apply.)?
Which of the following factors would increase the rate of a reaction? (Select all that apply.) increasing the temperature increasing the energy of activation increasing the concentrations of the reactants decreasing the energy of activation decreasing the concentrations of the reactants decreasing the temperature adding a catalyst
How does a catalyst increase the rate of reaction?
A catalyst is a substance which speeds up a reaction without it being changed at the end of the reaction . Each reaction normally needs a specific amount of energy ( i.e activation energy) to enable the collision of particles in that reaction and enable a reaction to occur . The role of the catalyst is to reduce that activation energy needed for a reaction to occur . Thus, lowers the time taken ,fastens collision of particles and reduces the activation energy
Which would decrease the rate of a chemical reaction?
2 :)