Chapter 9 Flashcards
Heat
Transfer of energy between two bodies at different temperatures
Thermodynamics
the study of energy and interconversions
Thermochemistry
the study of heat change in chemical reactions
system
Specific items or area of interest
surroundings
All else with which system can exchange energy
State functions
properties that are determined by the state of the system, regardless of how that condition was achieved
delta E
the change in internal energy of a system
Q
the heat exchange between the system and the surround
w
work done on (or by) the system
work done by the system on the surroundings
negative
work done on the system by the surrounding
positive
specific heat (s)
he amount of heat (q)required to raise the temperature of one gram of the substance by one degree Celsius
heat capacity (C)
the amount of heat(q) required to raise the temperature of an item with a set quantity (e.g. a calorimeter) by one degree Celsius.
Enthalpy
the sum of the internal energy and the product of pressure and volume
Exothermic process
any process that gives off heat –transfers thermal energy from the system to the surroundings
