Is it getting hot in here?
Ch ch ch changes (in temperature)
Ch ch ch changes (in enthalpy)
Order in the Classroom!
A bit of this and that...
100
The type of energy transferred between objects at different temperatures.
What is heat?
100
"C" is defined as the amount of heat needed to raise one mole of a substance by 1 K.
What is molar heat capacity?
100
This describes a reaction that releases energy.
What is exothermic?
100
The measure of the disorder of a system and its symbol.
What is entropy (Δs)?
100
A measurement for a property of this type does not change if we change the amount of matter in our sample.
What is intensive property?
200
This is the total energy of a system.
What is its enthalpy?
200
"c_p" is the amount of heat needed to raise one gram of a substance by 1 K.
What is specific heat?
200
You have this kind of reaction if your calculated ΔH is negative.
What is exothermic?
200
The total change of entropy of a system can be calculated this way.
What is ΔS = ΔS_products - ΔS_reactants?
200
The conversion factor to go from Kelvin to Celcius temperatures.
What is subtract 273?
300
The property we measure as the average kinetic energy of particles.
What is temperature?
300
The amount of heat needed to raise 2.5 mol of a substance by 10 K if the molar heat capacity is 100 J/mol*K
What is 2500 J?
300
The law that states changes to a system are the same whether calculated as a single reaction or a series of intermediate steps.
What is Hess's Law?
300
The quantity that determines spontaneity for a reaction and its symbol.
What is Gibbs energy (ΔG)?
300
The conversion factor between changes in temperature expressed in either Celsius or Kelvin.
What is 1:1 (they're the same number)?
400
The device used to measure the energy released by a reaction.
What is a calorimeter?
400
The equation for molar enthalpy change, the change of enthlpy of one mole of a substance.
What is ΔH = CΔT?
400
The basic formula that relates changes in enthlpy to the enthalpies of reactants and products.
What is ΔH = ΔH_products - ΔH_reactants?
400
A Gibbs energy change that is positive means what?
What is the reaction is not spontaneous?
400
The unit of temperature you must ALWAYS use when computing changes in Gibbs energy.
What is Kelvin?
500
The direction that heat energy flows between two objects at different temperatures.
What is from hot to cold?
500
The change in temperature of 10.0 mol of a substance with a molar heat capacity of 5.0 g/mol*K if 1000 J of energy is removed from the system.
What is -20 K?
500
The standard enthalpy of formation for a pure element.
What is zero?
500
Two ways to calculate the change in Gibbs energy.
What are: ΔG = ΔG_products - ΔG_reactants ΔG = ΔH - TΔS
500
The conversion factor between molar heat capacity and specific heat.
What is molar mass x c_p = C (molar mass)(specific heat) = (molar heat capacity)
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