Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
standard heat of formation
|
the enthalply change for the formation equation when all substances are in their standard states
|
|
heat of reaction
|
the enthalpy change of a reaction
|
|
change in enthalpy
|
the change in internal energy plus the product of the constant pressure and the change in volume
|
|
fossil fuel
|
any fuel, including coal, petroleum, and natural gas, derived from the products of the decay of dead organisms
|
|
pressure-volume work
|
a type of work in which a volume change occurs against an external pressure
|
|
formation equation
|
an equation in which 1 mole of a compound forms from its elements
|
|
standard heat of reaction
|
the enthalpy change that occurs during a reaction, with all substances in their standard states
|
|
standard states
|
a set of specifications used to compare thermodynamic data
|
|
Hess's law of heat summation
|
a law stating that the enthalpy change of an overall process is the sum of the enthalpy changes of the individual steps of the process
|
|
thermochemical equation
|
a chemical equation that shows the heat of reaction for the amounts of substances specified
|
|
calorimeter
|
a device used to measure the heat released or absorbed by a physical or chemical process taking place within it
|
|
heat
|
the energy transferred between objects because of differences in their temperatures only; thermal energy
|
|
surroundings
|
all parts of the univers other than the system being considered
|
|
system
|
the defined part of the universe under study
|
|
thermochemistry
|
the branch of thermodynamics that focuses on the heat involved in chemical reactions
|
|
thermodynamics
|
the study of heat (thermal energy) and and its interconversions
|
|
molar heat capacity
|
the quantity of heat required to change the temperature of 1 mole of a substance by 1 K
|
|
specific heat capacity
|
the quantity of heat required to change the temperature of 1 gram of substance by 1 K
|
|
heat capacity
|
the quantity of heat required to change the temperature of an object by 1 K
|
|
endothermic process
|
one occurring with an absorption of heat from the surroundings and therefore an increase in the enthalpy of the system
|
|
enthalpy diagram
|
a graphic depiction of the enthalpy change of a system
|
|
enthalpy
|
a thermodynamic quantity that is the sum of the internal energy plus the product of the pressure and volume
|
|
state function
|
a property of a system determined by its current state, regardless of how it arrived at that state
|
|
exothermic process
|
one occuring with a release of heat to the surroundings and therefore a decrease in the enthalpy of the system
|
|
calorie
|
a unit of energy defined as exactly 4.184 joules; originally defined as the heat needed to raise the temperature of 1 gram water 1 degree celsius
|
|
joule
|
the SI unit of energy
|
|
law of conservation of energy
first law of thermodynamics |
a basic observation that the total energy of the universe is constant
|
|
work
|
the energy transferred when an object is moved by force
|
|
internal energy
|
the sum of the kinetic and potential energies of all the particles in a system
|