CEM 141 Exam 3 Graded A+ Solved
100% Correct
∆E = - ANSWER-final E - initial E
∆E = (in terms of q & w) - ANSWER-q + w
0°C = ______ K - ANSWER-273.15
0K is also considered what? - ANSWER-absolute zero
a change of 1°C = change of ___ K - ANSWER-1
a permanent dipole means the bond is: - ANSWER-polar
a single bond is always a (sigma/pi) bond - ANSWER-sigma
after the electronegative atom pulls the electrons toward itself, this results in a: -
ANSWER-permanent dipole
alkenes have (restricted/free) rotation around the bond - ANSWER-restricted
an atom that has a high effective nuclear charge... - ANSWER-attracts its own valence
electrons strongly AND attracts electrons from other atoms in bonds
anions are (larger/smaller) than corresponding atom?? - ANSWER-larger
anions are (positively/negatively) charged - ANSWER-negatively
anything more than a single bond is always a (sigma/pi) bond - ANSWER-pi
as energy is added, it can: - ANSWER-increase kinetic energy AND be used to
overcome IMFs in the substance
assume all centers of electron density (repel/attract) each other - ANSWER-repel
at a given temp, the _________ is the same for all gases - ANSWER-kinetic energy
at a given temp, velocity of heavier molecule is (slower/faster) than velocity of a smaller
molecule? - ANSWER-heavier molecule is slower than smaller molecule
at a phase change, the temp doesn't change until: - ANSWER-the phase change is
complete
, at constant pressure, q (thermal energy change) is a ____ function - ANSWER-state
at the molecular scale, we consider: - ANSWER-populations
bond dipoles are ______ quantities - ANSWER-vector
bond dipoles have: - ANSWER-shape and direction
bonds between carbon in tetrahedral C are called: - ANSWER-sigma bonds
C-C-C bond angle in graphite is: - ANSWER-120°
can individual particles have a temperature? - ANSWER-nah fam
carbon forms bonds to what elements? - ANSWER-C, H, O, N, S, P and lots of others
(including halogens)
carbon uses what for bonding in diamond?? - ANSWER-hybrid orbitals
cations are (larger/smaller) than corresponding atom? - ANSWER-smaller
cations are (positively/negatively) charged - ANSWER-positively
change of state from gas --> liquid --> solid ______ energy - ANSWER-releases
change of state from solid -> liquid -> gas ________ energy - ANSWER-requires
charge of anions usually corresponds to: - ANSWER-gain of electrons to the next filled
(sub) shell (i.e. noble gas configuration)
charge of cations usually corresponds to: - ANSWER-loss of electrons back to "core"
but not b/c this is more stable
closed system - ANSWER-transfer energy but not matter (a closed container)
compounds that have H-bonds also have what IMFs? - ANSWER-dipole-dipole
interactions and LDFs
covalent bonds are caused by: - ANSWER-attraction between electrons of one atom
and the nucleus of another
covalent bonds are located: - ANSWER-between molecules/networks
covalent bonds are the sharing of: - ANSWER-valence electrons
diamond does/does not conduct electricity?? - ANSWER-does not
100% Correct
∆E = - ANSWER-final E - initial E
∆E = (in terms of q & w) - ANSWER-q + w
0°C = ______ K - ANSWER-273.15
0K is also considered what? - ANSWER-absolute zero
a change of 1°C = change of ___ K - ANSWER-1
a permanent dipole means the bond is: - ANSWER-polar
a single bond is always a (sigma/pi) bond - ANSWER-sigma
after the electronegative atom pulls the electrons toward itself, this results in a: -
ANSWER-permanent dipole
alkenes have (restricted/free) rotation around the bond - ANSWER-restricted
an atom that has a high effective nuclear charge... - ANSWER-attracts its own valence
electrons strongly AND attracts electrons from other atoms in bonds
anions are (larger/smaller) than corresponding atom?? - ANSWER-larger
anions are (positively/negatively) charged - ANSWER-negatively
anything more than a single bond is always a (sigma/pi) bond - ANSWER-pi
as energy is added, it can: - ANSWER-increase kinetic energy AND be used to
overcome IMFs in the substance
assume all centers of electron density (repel/attract) each other - ANSWER-repel
at a given temp, the _________ is the same for all gases - ANSWER-kinetic energy
at a given temp, velocity of heavier molecule is (slower/faster) than velocity of a smaller
molecule? - ANSWER-heavier molecule is slower than smaller molecule
at a phase change, the temp doesn't change until: - ANSWER-the phase change is
complete
, at constant pressure, q (thermal energy change) is a ____ function - ANSWER-state
at the molecular scale, we consider: - ANSWER-populations
bond dipoles are ______ quantities - ANSWER-vector
bond dipoles have: - ANSWER-shape and direction
bonds between carbon in tetrahedral C are called: - ANSWER-sigma bonds
C-C-C bond angle in graphite is: - ANSWER-120°
can individual particles have a temperature? - ANSWER-nah fam
carbon forms bonds to what elements? - ANSWER-C, H, O, N, S, P and lots of others
(including halogens)
carbon uses what for bonding in diamond?? - ANSWER-hybrid orbitals
cations are (larger/smaller) than corresponding atom? - ANSWER-smaller
cations are (positively/negatively) charged - ANSWER-positively
change of state from gas --> liquid --> solid ______ energy - ANSWER-releases
change of state from solid -> liquid -> gas ________ energy - ANSWER-requires
charge of anions usually corresponds to: - ANSWER-gain of electrons to the next filled
(sub) shell (i.e. noble gas configuration)
charge of cations usually corresponds to: - ANSWER-loss of electrons back to "core"
but not b/c this is more stable
closed system - ANSWER-transfer energy but not matter (a closed container)
compounds that have H-bonds also have what IMFs? - ANSWER-dipole-dipole
interactions and LDFs
covalent bonds are caused by: - ANSWER-attraction between electrons of one atom
and the nucleus of another
covalent bonds are located: - ANSWER-between molecules/networks
covalent bonds are the sharing of: - ANSWER-valence electrons
diamond does/does not conduct electricity?? - ANSWER-does not
