Ch 5 Flashcards
1
Q
Thermochemistry
A
Energy changes that take place during a chemical reaction
2
Q
Energy=
A
Work + Heat
3
Q
Potential Energy
A
Stored energy
I.e. Rock at the top of a wall
4
Q
Chemical energy
A
A form of potential energy where chemical bonds of a molecule act as the storage medium
Releases potential energy as heat light or work
5
Q
Energy Equation
A
2
E =1/2mv
k
6
Q
Joule
A
2
1kgXm
1 joule= ---------
2
S
7
Q
Chemical Thermodynamics
A
Study of energy and its transformations
8
Q
State functions
A
Value depends on present state of the system
9
Q
Energy is a State Function
A
ΔE=E - E
final initial
ΔE=q+w
10
Q
Specific Heat
A
q
massXΔT
11
Q
Hess’s Law
A
ΔH is every part of the equation added together
12
Q
Enthalpy
A
Heat input or output
13
Q
Enthalpy of Formation
A
How elements appear at room temp (25 C)
I.e. O
2
