SYSTEM BOUNDARY: a closed surface surrounding a system through which energy and mass may enter or leave the system
TYPES OF SYSTEM
A) open
B) closed
C) isolated
EXOTHERMIC PROCESS: any process that gives off heat; the energy will be listed as product
ENDOTHERMIC PROCESS: any process in which heat is required by the system; the energy will be listed as reactant
ENDOTHERMIC AND EXOTHERMIC PROCESSES
FIRST LAW OF THERMODYNAMICS
• The study of the energy involved in chemical changes is called thermochemistry.
• When the focus of the study is on the different transformations and movement of energy, it is called thermodynamics
• First Law of Thermodynamics: LAW OF CONSERVATION OF ENERGY
FIRST LAW OF THERMODYNAMICS
“Energy can neither be created nor destroyed, only altered in form
The energy of the system is the sum of kinetic energy and potential energy of the components of the system, this is called internal energy of the system (△E)
FIRST LAW OF THERMODYNAMICS
Calorimetry is the process of measuring the amount of heat that is either released or absorbed during a physical or chemical reaction
Specific heat (c) is the amount of heat required to raise its temperature by 1 K (or 1 °C) of 1 g of a substance.
Heat capacity (C) of a substance is the amount of heat required to raise the temperature of a given amount of the substance by one degree Celsius
