Flashcards in Ap Chem. Ch.5 Deck (32)
The study of energy and its transformations
The study of the relationships between chemical reactions and energy changes involving heat.
Ability to work or transfer heat.
Energy used to cause and object that has mass to move.
Energy used to cause the temperature of an object to rise.
Energy of motion
Equation for kinetic energy
E = 1/2mv^2
Energy an object possesses by virtue of its position or chemical composition.
Joule actually equals...
F x d
The energy transfered from a hotter object to a colder one.
-deals with the motion of objects
-always flows from hot to cold objects
States that energy cannot be created or destroyed.
The first law of thermodynamics
The total energy of a system
Changes in internal energy can be measured using this equation.
/_\ E= Ef-Ei
When a system undergoes a physival or chemical change, the change in internal energy is given by the heat added or liberated from the system plus the work done on or by the system. What is the equation?
/_\E= q +w
An endothermic process is one that ________ heat from the surroundings.
An exothermi processs is one that ______heat to the surroundings.
Depends only on the initial and final states of a system, not by the path by which the system arrived at that state.
A state function
P,V,T,E,H are state fuctions.
Heat changes at constant pressure
Chemical changes may involve...
-may also involve work done on or by the system
Release of absorption of heat
The heat transfered between the system and surroundings during a chemical reaction carried out under constant pressure.
The enthalpy change that accompanies a reation is called...
Enthalpy of reaction
Balanced chemical equation that includes states and energy
Enthalpy is an ______ property
The /_\ H of enthalpy is _______proportional to the amount of reactant consumed.
Measurment of heat flow.
Is an apparatus that measures heat flow.
The amount of energy required to raise the temperature of an object by 1 degree celsius.
The heat capacity of 1 g of a substance.