Thermochemistry background: Definitions from 5.3, 5.41.Thermochemistry– The study of the energy changes in chemical reactions. 2.System– That part of the universe we wish to study. 3.Surroundings– That part of the universe other than the system being studied. 4.Boundary– That which divides a system from its surroundings. 5.State of system– The set of specific values of the physical properties of a system (composition, state, concentration, temperature, pressure, volume). Change of state6.– Transformation of matter from one physical state to another. In thermochemistry, any change in a variable used to define the state of a particular system. 7.Endothermic– A change in which a system’s internal energy increases (thus energy is absorbed) 8.Exothermic– A change in which a system’s internal energy decreases (thus energy is released) 9.Heat of reaction(q) – The heat exchanged between a system and its surroundings when the entire change in energy involves heat. Exothermic is –. Endothermic is +.
This is the end of the preview.
access the rest of the document.