464439
Descrição
Mapa Mental por Vita Mishtii, atualizado more than 1 year ago
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Criado por Vita Mishtii
quase 11 anos atrás
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|
Energy Changes
and Rates of
Reaction
- Thermochemistry
- Energy Changes in Chemical and Nuclear Reactions
- The Nature of Energy
- Thermochemistry
- Energy
- Work
- Potential Energy
- Chemical Bonds
- Chemical Bonds
- Kinetic Energy
- Thermochemistry
- Thermal Energy, Heat, and Temperature
- Thermal Energy
- More thermal energy=more movement
- Heat
- warm => cold
- warm => cold
- Heat
- More thermal energy=more movement
- Temperature
- increase as kinetic energy increases
- increase as kinetic energy increases
- Thermal Energy
- Law of Conservation of Energy
- universe divided into 2 parts
- Chemical system
- open
- propane BBQ
- propane BBQ
- closed
- glowstick
- glowstick
- isolated
- impossible to set up one on EARTH
- impossible to set up one on EARTH
- open
- Surroundings
- Chemical system
- universe divided into 2 parts
- Endothermic and Exothermic Reactions
- Exothermic
- products have lower potential energy
- stronger bonds
- stronger bonds
- energy added on the products side
- products have lower potential energy
- Endothermic
- products have a higher potential energy
- weaker bonds
- energy on the reactant side
- weaker bonds
- products have a higher potential energy
- Exothermic
- Nuclear Energy
- reactions all exothermic
- fusion
- release vast amounts of energy
- sun and star
- scientists try to create
generators but it's hard due to
the intense heat and pressure
- sun and star
- release vast amounts of energy
- fission
- does not occur in nature
- elements above atomic
number 83 are unstable
and can undergo fission
- nuclear power plants
use fission of
uranium to produce
electricity
- nuclear power plants
use fission of
uranium to produce
electricity
- does not occur in nature
- fusion
- reactions all exothermic
- The Nature of Energy
- Calorimetry and Enthalpy
- specific heat capacity
- water : 4.18 J/g*C)
- water : 4.18 J/g*C)
- calorimetry and thermal
energy transfer
- calorimeter
- well insulated reaction chamber
- tight fitting cover with
insulated holes for a
thermometer
- something to stir
the calorimeter
contents
- coffee-cup
- labratory
- bomb
- what to assume when using a
coffee-cup calorimeter
- thermal energy transferred
to outside or absorbed is
negligable
- all dilute aqueous
solutions have the same
density and specific heat
capacity as water
- thermal energy transferred
to outside or absorbed is
negligable
- well insulated reaction chamber
- total amount of thermal energy absorbed or released: q=mcΔT
- q+ =exo
- q+ =exo
- calorimeter
- enthalpy
- +q = -H = exo
- to obtain molar enthalpy value: nΔHr
- +q = -H = exo
- specific heat capacity
- Bond Energy
- as the number of
bonds increases the
bond length shortends
- bond breaking=exo; bond making =endo
- more energy is needed to break multiple bonds than single
- bond breaking=exo; bond making =endo
- as the number of
bonds increases the
bond length shortends
- Hess's Law
- Energy Changes in Chemical and Nuclear Reactions
- Chemical Kinetics
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