Reactions 1
How fast a reaction occurs is known as this.
What is a reaction rate?
The point when there is no overall change in the amount of products and reactants is known as this.
What is equilibrium?
A process in which some substances change into different substances.
What is a chemical reaction?
In a chemical reaction, there must be this.
What is the same number and type of atoms on either side of the arrow?
In a chemical reaction, these are formed and broken.
What are chemical bonds?
This is a symbolic representation of a chemical reaction.
What is a chemical equation?
Increasing the surface area of a reactant is thought to increase reaction rate via this mechanism.
What is more exposure of surfaces between colliding reactants?
Higher temperatures are thought to increase reaction rate via this mechanism.
What is faster and more forceful collisions between reactant molecules?
Factors that influence reaction rate are these.
What are temperature, concentration, surface area, and the presence of catalysts?
This states that the amount of energy in a reaction always remains the same.
What is the law of conservation of energy?
Catalysts in living things are called this.
What are enzymes?
Catalysts increase reaction rates by doing this.
What is reduce the activation energy of a reaction?
This type of chemical reaction feels cold to the touch.
What is an endothermic reaction?
The energy required to get a chemical reaction started is known as this.
What is activation energy?
This type of chemical reaction feels warm to the touch.
What is an exothermic reaction?
In this type of chemical reaction, it takes less energy to break bonds in the reactants than is released when new bonds form in the products.
What is an exothermic reaction?
Substance that start a chemical reaction are called this.
What are reactants?
Greater reactant concentration is thought to increase reaction rate via this mechanism.
What is more opportunity for reactant molecules to collide and react?
This the number of particles of a substance in a given volume.
What is concentration?
Substances produced in a chemical reaction are called this.
What are products?
Splitting 4 molecules of water will result in the release of this number of molecules of oxygen gas (O2).
What are two molecules of oxygen gas?
This is a substance that increases the reaction rate but is not used up the reaction.
What is a catalyst?
These are four common signs of a chemical reaction.
What are a change in color, a change in temperature, a production of a gas, and the production of a solid?
This states that the same mass of matter must end up in both the product and reactants.
What is the law of the conservation of mass?
In this type of chemical reaction, more energy is required to break bonds than is release in the products.
What is an endothermic reaction?