Collision theory gizmo - Study guides, Class notes & Summaries

Question: How does temperature affect the rate of a chemical reaction? 1. Observe: Select the ANIMATION tab. View the animation with No catalyst selected. What do you see? the higher the temperature, the faster the chemical reaction. When two reactant molecules meet, they form a temporary structure called an activated complex. The activated complex breaks up into the product molecules. 2. Observe: Return to the CONTROLS pane. Set the Temperature to 0 °C and the Simulation speed to its max...

1. Suppose you added a spoonful of sugar to hot water and another to ice-cold water. Which type of water will cause the sugar to dissolve more quickly? Hot water. 2. Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will catch fire more easily? Wood shavings. Gizmo Warm-up A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are...

Protecting passengers in a collision In a collision (e.g. car crash): there's a sudden change in momentum. A large force can be exerted on passengers by rapid deceleration, causing injuries. Seatbelts, crumple zones, and airbags in cars help reduce injuries in a crash by reducing momentum more gradually. Each of these features also absorbs some of the energy of the collision and transfers it into a less dangerous form. Seatbelt How it works in a crash: Stretches, rather than holdin...

Kelvin A temperature scale based on absolute zero Absolute zero The coldest possible temperature, 0 Kelvin, that can be reached. It is the hypothetical temperature at which all molecular motion stops. controlled experiment An experiment in which only one variable is changed while keeping all other variables constant. Ex: If you were investigating the effect of temperature on the rate of diffusion, you would experiment with different temperatures, but leave the particle mass, ...

rate of chemical reaction A rate is a measure of how much something changes within a specified amount of time. In chemistry, the rate of a chemical reaction, or the reaction rate, is usually expressed as the change in the amount of reactant or product per unit time. Collision Theory A model called collision theory is used to relate the properties of particles to the rates of chemical reactions. According to collision theory, atoms, ions, and molecules can react to form products when t...

AP PHYSICS Student Exploration: Collision Theory Gizmo

The orientation of the molecules in a collision must allow for contact between: the atoms that will be bonded to one another in the product Regarding collision theory for bimolecular and higher order reactions,which of the following are FALSE? (select all that apply) An increase in concentration leads to fewer collisions between reacting molecules. Collisions with the correct orientation will always result in a reaction. Reactions can occur without properly oriented collisions. ...

Absolute brightness the intrinsic brightness of a star that depends only on its luminosity. Apparent brightness how bright a star appears to an observer on Earth. Mpc Astronomers describe the apparent brightness of a star as the ratio between the brightness of the star to the brightness of the Sun when viewed from a distance of 1 _____________ . For example, a star with an apparent brightness of 10 is 10 times brighter than the sun would be if viewed from a distance of 1 _______...

center of mass the point in an object that moves as if all the object's mass were concentrated at that point conservation of energy the principle that the total energy in a closed system remains conservation of momentum Momentum of a system remains constant when there are no net external forces acting on it. Elasticity a measure of the responsiveness of quantity demanded or quantity supplied to a change in one of its determinants kinetic energy energy of motion ...