chapter 2 - energy from fuels Flashcards
1
Q
potential energy
A
attraction between nuclei and electrons
2
Q
kinetic energy
A
movement of particles
3
Q
law of conservation of energy
A
energy can neither be created or destroyed, only transferred
4
Q
delta H
A
H(products) - H(reactants)
change in temperature, gives indication of change in enthalpy
5
Q
exothermic reactions
A
temp increases, heat energy is being released to surroundings
H(products) < H(reactants)
6
Q
endothermic reactions
A
temp decreases, heat energy is being absorbed from surroundings
7
Q
activation energy
A
the amount of energy required for a reaction to occur
the amount of energy required to break bonds of reactants
8
Q
complete combustion
A
- oxygen is plentiful
- products are CO2 and H2O
- blue flame
9
Q
incomplete combustion
A
- oxygen is limited
- products are CO or C and H2O
- yellow flame
- delta H is less than absolute value (that of complete combustions)
10
Q
energy of combustion equation
A
q = n x delta H
11
Q
energy absorbed by any mass of water
A
q = mCAT
