Studied by 39 peopleSpecific heat capacity
the amount of energy needed to change 1 g of a substance by 1 °C.
Specific heat of water
4.18
Calorimetry
the accurate and precise measurements of heat changes for chemical and physical processes.
Endothermic
process that absorbs energy
Exothermic
process that releases energy
enthalpy
the heat content for systems at a constant pressure (represented as H).
thermometer
instrument used to measure average kinetic energy
joule
SI unit for energy
calorie (lowercase c)
one calorie is the amount of energy needed to raise 1 g of water by 1 °C
kinetic energy
the energy of motion
potential energy
stored energy or energy of position
solid
1
liquid
3
gas
5
endothermic
Type of process
Reactants
A
Products
B
Heat change (delta H)
C
x-axis label
Reaction
y-axis label
Potential Energy
exothermic
Type of process?
1 Cal= 0.00418 J
Cal to Joules
1 cal= 4.18 J
cal to Joules
1000 cal= 1 Cal
cal to Cal
H°f
standard heat of formation
Standard temperature (STP)
0° C
Standard pressure (STP)
1 atm or 101.3 kPa
Law of conservation of energy
energy cannot be created nor destroyed
Temperature
the measurement of average kinetic energy
Work
moving matter against an opposing force
Energy
the capacity to do work
Thermochemistry
the study of heat changes that occur during chemical reactions and physical changes of state.
Heat capacity
the amount of energy needed to change the temperature of an object by 1 °C.
Calorimeter
device used to measure the heat absorbed or given off.
Thermochemical reactions
an equation including heat change (NOT q=mcAT).
Heat of reaction
the heat change for an equation as written.
molar heat of combustion
energy change when burning one mole of a substance.
molar heat of fusion
energy change when melting one mole of a substance.
Molar heat of solidification
energy change when freezing one mole of a substance.
molar heat of vaporization
energy change when vaporizing one mole of a substance.
molar heat of condensation
energy change when condensing (changing from gas to liquid) one mole of a substance.
molar heat of solution
energy change per mole of solute when making a solution.
heating curve
represents heat vs. temp.
vaporization
4 (pink)
condensation
4 (green)
solidification
2 (green)
melting
2 (pink)
Chemical potential energy
energy stored in chemicals because of their compositions
Note
Flashcard