Chem 134 Test 2 -Questions with Correct solutions
enthalpy (H)
measures the total heat within a system
ΔH measures the change in enthalpy or the change in heat
state
where 'we are' ; the position
ex. enthalpy (H)
Gibb's Free Energy (G)
Temperature (T)
path
how to get there; the 'path' to get there
ex. work (w)
heat (q)
first law of thermodynamics
energy cannot be created nor destroyed, it is conserved
ΔU = Q - W
endothermic
, energy is absorbed by the system and released by the surroundings
+ΔH
energy of the products is higher than the energy of the reactants
hot
exothermic
energy is released by the system and absorbed by the surroundings
-ΔH
energy of the products is lower than the energy of the reactants
cold
heat (q)
transfer of thermal energy
phase changes
during phases changes the temperature remains constant
if heat is added, the kinetic energy will increase
enthalpy (H)
measures the total heat within a system
ΔH measures the change in enthalpy or the change in heat
state
where 'we are' ; the position
ex. enthalpy (H)
Gibb's Free Energy (G)
Temperature (T)
path
how to get there; the 'path' to get there
ex. work (w)
heat (q)
first law of thermodynamics
energy cannot be created nor destroyed, it is conserved
ΔU = Q - W
endothermic
, energy is absorbed by the system and released by the surroundings
+ΔH
energy of the products is higher than the energy of the reactants
hot
exothermic
energy is released by the system and absorbed by the surroundings
-ΔH
energy of the products is lower than the energy of the reactants
cold
heat (q)
transfer of thermal energy
phase changes
during phases changes the temperature remains constant
if heat is added, the kinetic energy will increase
