Chapter 13 Chem Word Scramble

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Question	Answer
The branch of science that studies the transfer of energy during chemical reactions or phase changes	Thermochemistry
The AVERAGE KINETIC energy in the particles of a sample	temperature
measures the TOTAL amount of thermal energy transferred from one object to another	Heat (expressed in Joules)
It is _________ to determine the absolute amount of heat in something	impossible
Chemists measure the _________ in energy that occurs during a chemical reaction	change
Is the heat content of a system at a constant pressure	Enthalpy (H)
An insulated container, similar to a thermos, in which a thermometer detects the temperature change that occurs during a chemical reaction	Calorimeter
A Calorimeter measures ________	Enthalpy
Produces a temperature change (you can sense it happening	sensible heat
produces a phase change - FLAT on the graph - no change is detected	Latent heat
The amount of heat that has to be added to overcome the intermolecular forces so a solid can MELT	Molar enthalpy of fusion
The amount of heat required to convert a mole of a liquid at its boiling point to its vapor at the same temperature	Molar enthalpy of vaporization
The amount of energy that raises 1g of something by 1 degree C	Specific heat
High Specific Heat	LARGE amounts of heat
High specific heat retains heat values for ______ periods	longer
Low Specific Heat	Small amounts o energy
the change on enthalpy that occurs during a reaction is called the	enthalpy of reaction (delta H)
A chemical equation that shows the reactants, products, and amount of energy that is released or absorbed as heat	Thermochemical equation
Reverse reactions have the same magnitude, but _________ signs	different
Standard state	25 degree C and 1 atm
is the enhalpy change that makes 1 mole in its standard state from its elements in their standard states	Standard molar enthalpy of formation
The energy released as eat by the complete burning of one mole of a substance in standard conditions	Enthalpy of combustion
Combustion reactions must contain ________	oxygen
EXothermic	heat EXits
The enthalpy change of a reaction equals the sum of the enthalpy changes for each step of the process	Hess's Law
Chemical bonds _____ energy	STORE
When bonds are broken, energy is _______	RELEASED
Bonds are broken through ________	VIBRATION
The strength of the bond between any two atoms depends on the ________that are bonding and on the _________of the bond	Elements / length
Bonded atoms are ________ ________ than unbonded ones	more stable
Energy is __________ ___________ to break bonds	ALWAYS REQUIRED
Bond breaking is thus always an __________ process	ENDOTHERMIC
Forming bonds is always an ________ process.	EXOTHERMIC
The ______ the bond, the MORE energy is released	STRONGER
A reaction that breaks strong bonds and forms weak ones __________ energy	REQUIRES
A reaction that breaks weak bonds and forms strong ones _________ energy	RELEASES
In most cases, exothermic processes are thermodynamically _______	favorable
Ice melting, compressed gas is released and gets colder	Examples of endothermic reactions
Things are going from order to _____	disorder
Entropy is a measure of _________	RaNdomNeSS
Entropy increases with ______	temperature
Entropy is theoretically equal to zero at ________ ________	absolute zero
____ processes increase the entropy of the universe	All
A negative delta S tries to go against the tendency of disorder and attempts to _______ ___	decrease it
- H + S	-G at all Temps
-H -S	-G at low temps
+H +S	-G at high temps
+H -S	+G at all temps
Formulated a single way of figuring out favorability	J. Willard Gibbs
Gibbs combined entropy and enthalpy into a single term called_____ ______	Free Energy
-delta G is ___________	SPONTANEOUS! (Like you know who...negative and may spontaneous try to kill you_

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