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Ch. 16 vocab chem

chemistry

TermDefinition
thermodynamics the study of heat changes in chemical reactions
energy the ability to do work or produce heat
heat (q) the transfer of kinetic energy from warm objects to cooler objects
units of heat joules, calorie, Calorie, BTUs
calorimetry measure of heat released or absorbed during a chemical reaction
specific heat J needed to raise the temp of 1 g of a substance by 1 degree celsius
system environment chemical reactions take place in
Standard T and P in standard enthalpy change T=25 P=1 atm
enthalpy the heat content of a system at constant pressure
enthalpy change heat absorbed or released during a chemical reaction
Hess's Law if a series of reactions are added together, the enthalpy change for the net reaction is the sum of enthalpy change of individual steps
spontaneous chemical reaction a reaction that proceeds on its own w/o outside intervention
entropy (s) the disorder of substance in a chemical reactions
Created by: VaLeRiA!
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