Thermochemistry Video Assignment …

Thermochemistry Video Assignment
Please watch the following video Energy and Chemistry
Professor Hank: Energy & Chemistry: Crash Course Chemistry #17 /12
At what temperature do atoms have no energy? (Be sure to include a unit)____________________ (1)
DEFINITIONS – Include the symbol in the brackets ( ) – 5 marks
Potential Energy: ( )___________________________________________________________
First Law of Thermodynamics:___________________________________________________
Energy: ( )__________________________________________________________________
Work: ( )____________________________________________________________________
Heat: ( )_____________________________________________________________________
The System vs. The Surroundings
How are they different?__________________________________________________(1)
Internal Energy: ( )___________________________________________________________(1)
ΔE = q + w
Positive ΔE means the system is _______________ energy (1)
Negative ΔE means the system is ________________energy (1)
Exothermic Reaction:________________________________________________________ (1)
Endothermic Reaction:_______________________________________________________ (1)
Thermochemistry Video Assignment #2
Please watch the video Enthalpy: Crash Course Chemistry #18 and answer the following questions.

Heat:_______________________________________________________________________ (1)
Work:_____________________________________________________________________ (1)
Heat and work are _____________________ ____________________ meaning their amounts depend on the “path” taken, not just the starting and ending values (2)
Standard State: _______________________________________________________________(1)
State function:_______________________________________________________________(1)
Change in energy (ΔE) is a __________________ ___________________ meaning it is only dependent on the initial and final conditions (2)
Change in Enthalpy (ΔH) is equal to the heat gained or lost by the system.
Heat leaving the system is _________ while heat gained by the system is _________ (2)
Standard Enthalpy of Formation:________________________________________________(1)
The enthalpy change for a __________ is equal to the sum of the enthalpy change of formation of all the __________ minus the sum of the enthalpy of formation of all of the __________ (3)
Hess’s Law:________________________________________________________________(1)
ΔHreaction = ∑n*ΔHproducts – ∑n*ΔHreactants
Thermochemistry Video Assignment #3
Please watch the video Calorimetry: Crash Course Chemistry #19 and answer the following questions.

Hess’s Law:____________________________________________________________________
Standard Enthalpy of Formation:___________________________________________________
q = mcΔT is the same as ΔH=smΔT (4)
ΔT= _____________________________________________________________
Specific Heat Capacity: ________________________________________________________ (1)
Can be looked up in a reference book or the internet
Energy comes from the energy gained or released when chemical bonds are formed or broken
Why does the specific Heat give a different answer than Hess’s Law? (2)
These are sources of error with the experiment
Thermochemistry Video Assignment #4
Please watch the video Entropy: Crash Course Chemistry #20 to answer the following questions.

Second Law of Thermodynamics:________________________________________________ (1)
When increasing the order of one system, the order of another system must decrease
Entropy (S):_______________________________________________________________(1)
ΔS =
n Sproducts –
n Sreactants
Spontaneous:_______________________________________________________________ (2)
_____Ba(OH)28H2O + _____NH4Cl → ______NH3 + _____BaCl2 + ______H2O (2 marks)
ΔH = ______ is positive because ___________________________________________(1marks)
ΔS = ______ is positive means _____________________________________(1 marks)
Gibb’s Free Energy:_____________________________________________________ (1 marks)
ΔGreaction =ΔH – TΔS
T must be constant
ΔH > TΔS means the reaction is ________________ driven (1 marks)
ΔH < TΔS means reaction is ________________ driven (1 marks) ΔG is _________________________ means the reaction is spontaneous (1 marks) ΔG is _________________________ means the reaction is nonspontaneous (1 marks)

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