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Terms in this set (86)
Study of heat energy changes that accompany chemical reactions
Another name for heat of reaction
Enthalpy of formation
Net Energy chance resulta in the release of energy
Includes the quantity of heat released or absorbed during a chemical reaction
Broken when energy is applied
Net energy change results in absorption of energy
Specific form of energy applied to help reactions occur
Must be applied to break chemical bonds and released when the bonds are formed
A negative enthalpy of formation means heat is...by the formation of compound.
The symbol...indicates the enthalpy of formation of a compound.
Enthalpy is a...function.
A compound with a high...enthalpy of formation is usually a stable compound
Enthalpy can be measure only when it...
The randomness, or disorder, of a system is called...
The reverse of the enthalpy of combustion reaction is the enthalpy of... reaction
Change in enthalpy minutes the product of the Kelvin temperature and the entropy change is called...energy
Enthalpy describes a state that includes:
Chemical bonds are broken when two compounds react, and...are formed.
The enthalpy change involved in producing a mole of compound is called the enthalpy of...
The enthalpy of combustion is the amount of heat released by the combustion of one...of a material.
The enthalpy of formation for a combustible compound is found by using...law and the enthalpy of combustion
Reactants with low...tend to remain unreactive.
Two factors, enthalpy and...,work together to provide the driving force for chemical reactions.
If the value of free energy for a reaction is negative, the reaction proceeds...
Hess's law states that the change in enthalpy of a compound is the same whether the reaction forming the compound is completed in...step or in several steps.
A system with high enthalpy that includes the quantity of heat released or absorbed during a chemical reaction is called a...equation
A system with high enthalpy tends to move toward a state of...enthalpy but high entropy
Energy of motion
Energy of position or state
State function of a chemical reaction
Describes the disorder, or randomness, of a system
Symbol for a change in energy
Type of energy in a coiled spring
Elastic potential energy
Released or absorbed in discrete amounts called quanta
Type of energy lost due to friction during energy conversion
The type of energy transformed form a how object is called...energy.
...potential energy is gained when an object is raised above ground level.
Energy can be neither...nor destroyed
Work does not produce hear in a...environment
...energy is energy directly from the sun.
A system is a sample of matter and energy under...
Kinetic energy is...related to velocity
Potential energy is independent of the...history of the system in question.
An object at rest still has some...energy because the particles within it are moving.
The term...describes the disorder, or randomness, of a system
The...is also known as the law of conservation of matter and energy
First law of thermodynamics
The theory of...is disproved by the second law of thermodynamics.
An object...potential energy a it moves to a lower position
Matter may be converted to...
There are...laws of thermodynamics
In order to perform work, you must...something with force
An object traveling on the ground...gravitational potential energy as it related to the ground.
Changing the mass of an object...it's potential energy
The first law of thermodynamics states that the amount of...and...in the universe is constant.
The second law of thermodynamics states that in a spontaneous irreversible process, the total...of the system and it's surroundings always increases.
Chemical energy is stored in the...bonds of an object
A reaction that requires energy to be applied to form the products is an...reaction
...occur without an outside stimulus when reactants come into contact with each other.
In a chemical reaction, according to the first law of thermodynamics, the mass of the...equals the mass of the products.
We cannot measure energy, but we can measure its...
The second law of thermodynamics is also known a the law of...
Energy required to transform reactants into an activated complex
Step-by-step sequence of reactions by which the overall chemical change occurs.
Transitional structure that results from an effective collision and persists while old bonds are breaking and new bonds are forming
Set of assumptions regarding molecular collisions and reactions
Activation energy is large and the enthalpy change is positive
Energy of the activation complex minus this equals the activation energy in a forward reaction
Energy of the reactants
Enthalpy change for the overall reaction is the same as the sum of enthalpy changes for all the steps in the reaction
Activation energy in the reverse reaction
The point at which the reactant and product concentrations undergo no further changes is called the...
...explains the mechanism of equilibrium and how it affects the rate of chemical reactions
The law of mass action
During the forward reaction, recents must pass through the...forms before becoming products
The greater the equilibrium constant, the...the extent in which the reactants are being converted
Increasing reactant concentration in equilibrium will cause the ecru on to shift...the addition
Increasing the temperature increases the....of a reaction.
A...increases the rate of a chemical reaction without being permanently consumed
An...is a substance that slows down a chemical reaction.
The partial bonds that exist between the old and new bond formation are part of the structures called the...complex
A system adjusting itself back to equilibrium after being upset is the basis of...principle
Le Châtelier's principle
If an equilibrium constant is unchanged after its numerator increases, its... must have increased.
Concentration changes of reactants or producer have no effect on the...constant
Combustion reactions usually proceed faster if placed in an...gas environment
A forward reaction rate equals the reverse reaction if the...and temperature are normal
If the products remain longer in a...state during a reverse reaction, less products are concreted to reactions.
If a reaction at equilibrium favor the...reaction, the result is a higher concentration of reactants.
THIS SET IS OFTEN IN FOLDERS WITH...
Stoichiometry Chapter 9
Lesson 10, Unit 5 Chemistry A: Describing Chemical…
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